Merge branch 'fix/kconfig' into for-linus

27 files changed, 1908 insertions, 494 deletions

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 022f9eb0b7bf..86b0735e6aa0 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -28,6 +28,14 @@ menuconfig WATCHDOG
 
 if WATCHDOG
 
+config WATCHDOG_CORE
+	bool "WatchDog Timer Driver Core"
+	---help---
+	  Say Y here if you want to use the new watchdog timer driver core.
+	  This driver provides a framework for all watchdog timer drivers
+	  and gives them the /dev/watchdog interface (and later also the
+	  sysfs interface).
+
 config WATCHDOG_NOWAYOUT
 	bool "Disable watchdog shutdown on close"
 	help
@@ -186,6 +194,15 @@ config SA1100_WATCHDOG
 	  To compile this driver as a module, choose M here: the
 	  module will be called sa1100_wdt.
 
+config DW_WATCHDOG
+	tristate "Synopsys DesignWare watchdog"
+	depends on ARM && HAVE_CLK
+	help
+	  Say Y here if to include support for the Synopsys DesignWare
+	  watchdog timer found in many ARM chips.
+	  To compile this driver as a module, choose M here: the
+	  module will be called dw_wdt.
+
 config MPCORE_WATCHDOG
 	tristate "MPcore watchdog"
 	depends on HAVE_ARM_TWD
@@ -321,7 +338,7 @@ config MAX63XX_WATCHDOG
 
 config IMX2_WDT
 	tristate "IMX2+ Watchdog"
-	depends on ARCH_MX2 || ARCH_MX25 || ARCH_MX3 || ARCH_MX5
+	depends on IMX_HAVE_PLATFORM_IMX2_WDT
 	help
 	  This is the driver for the hardware watchdog
 	  on the Freescale IMX2 and later processors.
@@ -535,8 +552,7 @@ config I6300ESB_WDT
 
 config INTEL_SCU_WATCHDOG
 	bool "Intel SCU Watchdog for Mobile Platforms"
-	depends on WATCHDOG
-	depends on INTEL_SCU_IPC
+	depends on X86_MRST
 	---help---
 	  Hardware driver for the watchdog time built into the Intel SCU
 	  for Intel Mobile Platforms.
@@ -600,8 +616,7 @@ config IT87_WDT
 
 config HP_WATCHDOG
 	tristate "HP ProLiant iLO2+ Hardware Watchdog Timer"
-	depends on X86
-	default m
+	depends on X86 && PCI
 	help
 	  A software monitoring watchdog and NMI sourcing driver. This driver
 	  will detect lockups and provide a stack trace. This is a driver that
@@ -881,6 +896,20 @@ config M54xx_WATCHDOG
 	  To compile this driver as a module, choose M here: the
 	  module will be called m54xx_wdt.
 
+# MicroBlaze Architecture
+
+config XILINX_WATCHDOG
+	tristate "Xilinx Watchdog timer"
+	depends on MICROBLAZE
+	---help---
+	  Watchdog driver for the xps_timebase_wdt ip core.
+
+	  IMPORTANT: The xps_timebase_wdt parent must have the property
+	  "clock-frequency" at device tree.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called of_xilinx_wdt.
+
 # MIPS Architecture
 
 config ATH79_WDT
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index ed26f7094e47..55bd5740e910 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -2,6 +2,10 @@
 # Makefile for the WatchDog device drivers.
 #
 
+# The WatchDog Timer Driver Core.
+watchdog-objs	+= watchdog_core.o watchdog_dev.o
+obj-$(CONFIG_WATCHDOG_CORE)	+= watchdog.o
+
 # Only one watchdog can succeed. We probe the ISA/PCI/USB based
 # watchdog-cards first, then the architecture specific watchdog
 # drivers and then the architecture independent "softdog" driver.
@@ -37,6 +41,7 @@ obj-$(CONFIG_IXP4XX_WATCHDOG) += ixp4xx_wdt.o
 obj-$(CONFIG_KS8695_WATCHDOG) += ks8695_wdt.o
 obj-$(CONFIG_S3C2410_WATCHDOG) += s3c2410_wdt.o
 obj-$(CONFIG_SA1100_WATCHDOG) += sa1100_wdt.o
+obj-$(CONFIG_DW_WATCHDOG) += dw_wdt.o
 obj-$(CONFIG_MPCORE_WATCHDOG) += mpcore_wdt.o
 obj-$(CONFIG_EP93XX_WATCHDOG) += ep93xx_wdt.o
 obj-$(CONFIG_PNX4008_WATCHDOG) += pnx4008_wdt.o
@@ -109,6 +114,9 @@ obj-$(CONFIG_INTEL_SCU_WATCHDOG) += intel_scu_watchdog.o
 # M68K Architecture
 obj-$(CONFIG_M54xx_WATCHDOG) += m54xx_wdt.o
 
+# MicroBlaze Architecture
+obj-$(CONFIG_XILINX_WATCHDOG) += of_xilinx_wdt.o
+
 # MIPS Architecture
 obj-$(CONFIG_ATH79_WDT) += ath79_wdt.o
 obj-$(CONFIG_BCM47XX_WDT) += bcm47xx_wdt.o
diff --git a/drivers/watchdog/at32ap700x_wdt.c b/drivers/watchdog/at32ap700x_wdt.c
index 750bc5281d79..4ca5d40304b2 100644
--- a/drivers/watchdog/at32ap700x_wdt.c
+++ b/drivers/watchdog/at32ap700x_wdt.c
@@ -448,7 +448,7 @@ static void __exit at32_wdt_exit(void)
 }
 module_exit(at32_wdt_exit);
 
-MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
+MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
 MODULE_DESCRIPTION("Watchdog driver for Atmel AT32AP700X");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
diff --git a/drivers/watchdog/at91sam9_wdt.c b/drivers/watchdog/at91sam9_wdt.c
index eac26021e8da..87445b2d72a7 100644
--- a/drivers/watchdog/at91sam9_wdt.c
+++ b/drivers/watchdog/at91sam9_wdt.c
@@ -31,7 +31,7 @@
 #include <linux/bitops.h>
 #include <linux/uaccess.h>
 
-#include <mach/at91_wdt.h>
+#include "at91sam9_wdt.h"
 
 #define DRV_NAME "AT91SAM9 Watchdog"
 
@@ -284,27 +284,8 @@ static int __exit at91wdt_remove(struct platform_device *pdev)
 	return res;
 }
 
-#ifdef CONFIG_PM
-
-static int at91wdt_suspend(struct platform_device *pdev, pm_message_t message)
-{
-	return 0;
-}
-
-static int at91wdt_resume(struct platform_device *pdev)
-{
-	return 0;
-}
-
-#else
-#define at91wdt_suspend	NULL
-#define at91wdt_resume	NULL
-#endif
-
 static struct platform_driver at91wdt_driver = {
 	.remove		= __exit_p(at91wdt_remove),
-	.suspend	= at91wdt_suspend,
-	.resume		= at91wdt_resume,
 	.driver		= {
 		.name	= "at91_wdt",
 		.owner	= THIS_MODULE,
diff --git a/drivers/watchdog/at91sam9_wdt.h b/drivers/watchdog/at91sam9_wdt.h
new file mode 100644
index 000000000000..757f9cab5c82
--- /dev/null
+++ b/drivers/watchdog/at91sam9_wdt.h
@@ -0,0 +1,37 @@
+/*
+ * drivers/watchdog/at91sam9_wdt.h
+ *
+ * Copyright (C) 2007 Andrew Victor
+ * Copyright (C) 2007 Atmel Corporation.
+ *
+ * Watchdog Timer (WDT) - System peripherals regsters.
+ * Based on AT91SAM9261 datasheet revision D.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef AT91_WDT_H
+#define AT91_WDT_H
+
+#define AT91_WDT_CR		(AT91_WDT + 0x00)	/* Watchdog Control Register */
+#define		AT91_WDT_WDRSTT		(1    << 0)		/* Restart */
+#define		AT91_WDT_KEY		(0xa5 << 24)		/* KEY Password */
+
+#define AT91_WDT_MR		(AT91_WDT + 0x04)	/* Watchdog Mode Register */
+#define		AT91_WDT_WDV		(0xfff << 0)		/* Counter Value */
+#define		AT91_WDT_WDFIEN		(1     << 12)		/* Fault Interrupt Enable */
+#define		AT91_WDT_WDRSTEN	(1     << 13)		/* Reset Processor */
+#define		AT91_WDT_WDRPROC	(1     << 14)		/* Timer Restart */
+#define		AT91_WDT_WDDIS		(1     << 15)		/* Watchdog Disable */
+#define		AT91_WDT_WDD		(0xfff << 16)		/* Delta Value */
+#define		AT91_WDT_WDDBGHLT	(1     << 28)		/* Debug Halt */
+#define		AT91_WDT_WDIDLEHLT	(1     << 29)		/* Idle Halt */
+
+#define AT91_WDT_SR		(AT91_WDT + 0x08)	/* Watchdog Status Register */
+#define		AT91_WDT_WDUNF		(1 << 0)		/* Watchdog Underflow */
+#define		AT91_WDT_WDERR		(1 << 1)		/* Watchdog Error */
+
+#endif
diff --git a/drivers/watchdog/dw_wdt.c b/drivers/watchdog/dw_wdt.c
new file mode 100644
index 000000000000..f10f8c0abba4
--- /dev/null
+++ b/drivers/watchdog/dw_wdt.c
@@ -0,0 +1,376 @@
+/*
+ * Copyright 2010-2011 Picochip Ltd., Jamie Iles
+ * http://www.picochip.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * This file implements a driver for the Synopsys DesignWare watchdog device
+ * in the many ARM subsystems. The watchdog has 16 different timeout periods
+ * and these are a function of the input clock frequency.
+ *
+ * The DesignWare watchdog cannot be stopped once it has been started so we
+ * use a software timer to implement a ping that will keep the watchdog alive.
+ * If we receive an expected close for the watchdog then we keep the timer
+ * running, otherwise the timer is stopped and the watchdog will expire.
+ */
+#define pr_fmt(fmt) "dw_wdt: " fmt
+
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/fs.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/pm.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/timer.h>
+#include <linux/uaccess.h>
+#include <linux/watchdog.h>
+
+#define WDOG_CONTROL_REG_OFFSET		    0x00
+#define WDOG_CONTROL_REG_WDT_EN_MASK	    0x01
+#define WDOG_TIMEOUT_RANGE_REG_OFFSET	    0x04
+#define WDOG_CURRENT_COUNT_REG_OFFSET	    0x08
+#define WDOG_COUNTER_RESTART_REG_OFFSET     0x0c
+#define WDOG_COUNTER_RESTART_KICK_VALUE	    0x76
+
+/* The maximum TOP (timeout period) value that can be set in the watchdog. */
+#define DW_WDT_MAX_TOP		15
+
+static int nowayout = WATCHDOG_NOWAYOUT;
+module_param(nowayout, int, 0);
+MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started "
+		 "(default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+
+#define WDT_TIMEOUT		(HZ / 2)
+
+static struct {
+	spinlock_t		lock;
+	void __iomem		*regs;
+	struct clk		*clk;
+	unsigned long		in_use;
+	unsigned long		next_heartbeat;
+	struct timer_list	timer;
+	int			expect_close;
+} dw_wdt;
+
+static inline int dw_wdt_is_enabled(void)
+{
+	return readl(dw_wdt.regs + WDOG_CONTROL_REG_OFFSET) &
+		WDOG_CONTROL_REG_WDT_EN_MASK;
+}
+
+static inline int dw_wdt_top_in_seconds(unsigned top)
+{
+	/*
+	 * There are 16 possible timeout values in 0..15 where the number of
+	 * cycles is 2 ^ (16 + i) and the watchdog counts down.
+	 */
+	return (1 << (16 + top)) / clk_get_rate(dw_wdt.clk);
+}
+
+static int dw_wdt_get_top(void)
+{
+	int top = readl(dw_wdt.regs + WDOG_TIMEOUT_RANGE_REG_OFFSET) & 0xF;
+
+	return dw_wdt_top_in_seconds(top);
+}
+
+static inline void dw_wdt_set_next_heartbeat(void)
+{
+	dw_wdt.next_heartbeat = jiffies + dw_wdt_get_top() * HZ;
+}
+
+static int dw_wdt_set_top(unsigned top_s)
+{
+	int i, top_val = DW_WDT_MAX_TOP;
+
+	/*
+	 * Iterate over the timeout values until we find the closest match. We
+	 * always look for >=.
+	 */
+	for (i = 0; i <= DW_WDT_MAX_TOP; ++i)
+		if (dw_wdt_top_in_seconds(i) >= top_s) {
+			top_val = i;
+			break;
+		}
+
+	/* Set the new value in the watchdog. */
+	writel(top_val, dw_wdt.regs + WDOG_TIMEOUT_RANGE_REG_OFFSET);
+
+	dw_wdt_set_next_heartbeat();
+
+	return dw_wdt_top_in_seconds(top_val);
+}
+
+static void dw_wdt_keepalive(void)
+{
+	writel(WDOG_COUNTER_RESTART_KICK_VALUE, dw_wdt.regs +
+	       WDOG_COUNTER_RESTART_REG_OFFSET);
+}
+
+static void dw_wdt_ping(unsigned long data)
+{
+	if (time_before(jiffies, dw_wdt.next_heartbeat) ||
+	    (!nowayout && !dw_wdt.in_use)) {
+		dw_wdt_keepalive();
+		mod_timer(&dw_wdt.timer, jiffies + WDT_TIMEOUT);
+	} else
+		pr_crit("keepalive missed, machine will reset\n");
+}
+
+static int dw_wdt_open(struct inode *inode, struct file *filp)
+{
+	if (test_and_set_bit(0, &dw_wdt.in_use))
+		return -EBUSY;
+
+	/* Make sure we don't get unloaded. */
+	__module_get(THIS_MODULE);
+
+	spin_lock(&dw_wdt.lock);
+	if (!dw_wdt_is_enabled()) {
+		/*
+		 * The watchdog is not currently enabled. Set the timeout to
+		 * the maximum and then start it.
+		 */
+		dw_wdt_set_top(DW_WDT_MAX_TOP);
+		writel(WDOG_CONTROL_REG_WDT_EN_MASK,
+		       dw_wdt.regs + WDOG_CONTROL_REG_OFFSET);
+	}
+
+	dw_wdt_set_next_heartbeat();
+
+	spin_unlock(&dw_wdt.lock);
+
+	return nonseekable_open(inode, filp);
+}
+
+ssize_t dw_wdt_write(struct file *filp, const char __user *buf, size_t len,
+		     loff_t *offset)
+{
+	if (!len)
+		return 0;
+
+	if (!nowayout) {
+		size_t i;
+
+		dw_wdt.expect_close = 0;
+
+		for (i = 0; i < len; ++i) {
+			char c;
+
+			if (get_user(c, buf + i))
+				return -EFAULT;
+
+			if (c == 'V') {
+				dw_wdt.expect_close = 1;
+				break;
+			}
+		}
+	}
+
+	dw_wdt_set_next_heartbeat();
+	mod_timer(&dw_wdt.timer, jiffies + WDT_TIMEOUT);
+
+	return len;
+}
+
+static u32 dw_wdt_time_left(void)
+{
+	return readl(dw_wdt.regs + WDOG_CURRENT_COUNT_REG_OFFSET) /
+		clk_get_rate(dw_wdt.clk);
+}
+
+static const struct watchdog_info dw_wdt_ident = {
+	.options	= WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT |
+			  WDIOF_MAGICCLOSE,
+	.identity	= "Synopsys DesignWare Watchdog",
+};
+
+static long dw_wdt_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	unsigned long val;
+	int timeout;
+
+	switch (cmd) {
+	case WDIOC_GETSUPPORT:
+		return copy_to_user((struct watchdog_info *)arg, &dw_wdt_ident,
+				    sizeof(dw_wdt_ident)) ? -EFAULT : 0;
+
+	case WDIOC_GETSTATUS:
+	case WDIOC_GETBOOTSTATUS:
+		return put_user(0, (int *)arg);
+
+	case WDIOC_KEEPALIVE:
+		dw_wdt_set_next_heartbeat();
+		return 0;
+
+	case WDIOC_SETTIMEOUT:
+		if (get_user(val, (int __user *)arg))
+			return -EFAULT;
+		timeout = dw_wdt_set_top(val);
+		return put_user(timeout , (int __user *)arg);
+
+	case WDIOC_GETTIMEOUT:
+		return put_user(dw_wdt_get_top(), (int __user *)arg);
+
+	case WDIOC_GETTIMELEFT:
+		/* Get the time left until expiry. */
+		if (get_user(val, (int __user *)arg))
+			return -EFAULT;
+		return put_user(dw_wdt_time_left(), (int __user *)arg);
+
+	default:
+		return -ENOTTY;
+	}
+}
+
+static int dw_wdt_release(struct inode *inode, struct file *filp)
+{
+	clear_bit(0, &dw_wdt.in_use);
+
+	if (!dw_wdt.expect_close) {
+		del_timer(&dw_wdt.timer);
+
+		if (!nowayout)
+			pr_crit("unexpected close, system will reboot soon\n");
+		else
+			pr_crit("watchdog cannot be disabled, system will reboot soon\n");
+	}
+
+	dw_wdt.expect_close = 0;
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int dw_wdt_suspend(struct device *dev)
+{
+	clk_disable(dw_wdt.clk);
+
+	return 0;
+}
+
+static int dw_wdt_resume(struct device *dev)
+{
+	int err = clk_enable(dw_wdt.clk);
+
+	if (err)
+		return err;
+
+	dw_wdt_keepalive();
+
+	return 0;
+}
+
+static const struct dev_pm_ops dw_wdt_pm_ops = {
+	.suspend	= dw_wdt_suspend,
+	.resume		= dw_wdt_resume,
+};
+#endif /* CONFIG_PM */
+
+static const struct file_operations wdt_fops = {
+	.owner		= THIS_MODULE,
+	.llseek		= no_llseek,
+	.open		= dw_wdt_open,
+	.write		= dw_wdt_write,
+	.unlocked_ioctl	= dw_wdt_ioctl,
+	.release	= dw_wdt_release
+};
+
+static struct miscdevice dw_wdt_miscdev = {
+	.fops		= &wdt_fops,
+	.name		= "watchdog",
+	.minor		= WATCHDOG_MINOR,
+};
+
+static int __devinit dw_wdt_drv_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	if (!mem)
+		return -EINVAL;
+
+	if (!devm_request_mem_region(&pdev->dev, mem->start, resource_size(mem),
+				     "dw_wdt"))
+		return -ENOMEM;
+
+	dw_wdt.regs = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));
+	if (!dw_wdt.regs)
+		return -ENOMEM;
+
+	dw_wdt.clk = clk_get(&pdev->dev, NULL);
+	if (IS_ERR(dw_wdt.clk))
+		return PTR_ERR(dw_wdt.clk);
+
+	ret = clk_enable(dw_wdt.clk);
+	if (ret)
+		goto out_put_clk;
+
+	spin_lock_init(&dw_wdt.lock);
+
+	ret = misc_register(&dw_wdt_miscdev);
+	if (ret)
+		goto out_disable_clk;
+
+	dw_wdt_set_next_heartbeat();
+	setup_timer(&dw_wdt.timer, dw_wdt_ping, 0);
+	mod_timer(&dw_wdt.timer, jiffies + WDT_TIMEOUT);
+
+	return 0;
+
+out_disable_clk:
+	clk_disable(dw_wdt.clk);
+out_put_clk:
+	clk_put(dw_wdt.clk);
+
+	return ret;
+}
+
+static int __devexit dw_wdt_drv_remove(struct platform_device *pdev)
+{
+	misc_deregister(&dw_wdt_miscdev);
+
+	clk_disable(dw_wdt.clk);
+	clk_put(dw_wdt.clk);
+
+	return 0;
+}
+
+static struct platform_driver dw_wdt_driver = {
+	.probe		= dw_wdt_drv_probe,
+	.remove		= __devexit_p(dw_wdt_drv_remove),
+	.driver		= {
+		.name	= "dw_wdt",
+		.owner	= THIS_MODULE,
+#ifdef CONFIG_PM
+		.pm	= &dw_wdt_pm_ops,
+#endif /* CONFIG_PM */
+	},
+};
+
+static int __init dw_wdt_watchdog_init(void)
+{
+	return platform_driver_register(&dw_wdt_driver);
+}
+module_init(dw_wdt_watchdog_init);
+
+static void __exit dw_wdt_watchdog_exit(void)
+{
+	platform_driver_unregister(&dw_wdt_driver);
+}
+module_exit(dw_wdt_watchdog_exit);
+
+MODULE_AUTHOR("Jamie Iles");
+MODULE_DESCRIPTION("Synopsys DesignWare Watchdog Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
diff --git a/drivers/watchdog/gef_wdt.c b/drivers/watchdog/gef_wdt.c
index 29a7cd4b90c8..b146082bd85a 100644
--- a/drivers/watchdog/gef_wdt.c
+++ b/drivers/watchdog/gef_wdt.c
@@ -329,4 +329,4 @@ MODULE_AUTHOR("Martyn Welch <martyn.welch@ge.com>");
 MODULE_DESCRIPTION("GE watchdog driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
-MODULE_ALIAS("platform: gef_wdt");
+MODULE_ALIAS("platform:gef_wdt");
diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c
index 8cb26855bfed..410fba45378d 100644
--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -36,7 +36,7 @@
 #include <asm/cacheflush.h>
 #endif /* CONFIG_HPWDT_NMI_DECODING */
 
-#define HPWDT_VERSION			"1.2.0"
+#define HPWDT_VERSION			"1.3.0"
 #define SECS_TO_TICKS(secs)		((secs) * 1000 / 128)
 #define TICKS_TO_SECS(ticks)		((ticks) * 128 / 1000)
 #define HPWDT_MAX_TIMER			TICKS_TO_SECS(65535)
@@ -87,6 +87,19 @@ struct smbios_cru64_info {
 };
 #define SMBIOS_CRU64_INFORMATION	212
 
+/* type 219 */
+struct smbios_proliant_info {
+	u8 type;
+	u8 byte_length;
+	u16 handle;
+	u32 power_features;
+	u32 omega_features;
+	u32 reserved;
+	u32 misc_features;
+};
+#define SMBIOS_ICRU_INFORMATION		219
+
+
 struct cmn_registers {
 	union {
 		struct {
@@ -132,6 +145,7 @@ struct cmn_registers {
 static unsigned int hpwdt_nmi_decoding;
 static unsigned int allow_kdump;
 static unsigned int priority;		/* hpwdt at end of die_notify list */
+static unsigned int is_icru;
 static DEFINE_SPINLOCK(rom_lock);
 static void *cru_rom_addr;
 static struct cmn_registers cmn_regs;
@@ -476,19 +490,22 @@ static int hpwdt_pretimeout(struct notifier_block *nb, unsigned long ulReason,
 		goto out;
 
 	spin_lock_irqsave(&rom_lock, rom_pl);
-	if (!die_nmi_called)
+	if (!die_nmi_called && !is_icru)
 		asminline_call(&cmn_regs, cru_rom_addr);
 	die_nmi_called = 1;
 	spin_unlock_irqrestore(&rom_lock, rom_pl);
-	if (cmn_regs.u1.ral == 0) {
-		printk(KERN_WARNING "hpwdt: An NMI occurred, "
-			"but unable to determine source.\n");
-	} else {
-		if (allow_kdump)
-			hpwdt_stop();
-		panic("An NMI occurred, please see the Integrated "
-			"Management Log for details.\n");
+	if (!is_icru) {
+		if (cmn_regs.u1.ral == 0) {
+			printk(KERN_WARNING "hpwdt: An NMI occurred, "
+				"but unable to determine source.\n");
+		}
 	}
+
+	if (allow_kdump)
+		hpwdt_stop();
+	panic("An NMI occurred, please see the Integrated "
+		"Management Log for details.\n");
+
 out:
 	return NOTIFY_OK;
 }
@@ -659,30 +676,63 @@ static void __devinit hpwdt_check_nmi_decoding(struct pci_dev *dev)
 }
 #endif /* CONFIG_X86_LOCAL_APIC */
 
+/*
+ *	dmi_find_icru
+ *
+ *	Routine Description:
+ *	This function checks whether or not we are on an iCRU-based server.
+ *	This check is independent of architecture and needs to be made for
+ *	any ProLiant system.
+ */
+static void __devinit dmi_find_icru(const struct dmi_header *dm, void *dummy)
+{
+	struct smbios_proliant_info *smbios_proliant_ptr;
+
+	if (dm->type == SMBIOS_ICRU_INFORMATION) {
+		smbios_proliant_ptr = (struct smbios_proliant_info *) dm;
+		if (smbios_proliant_ptr->misc_features & 0x01)
+			is_icru = 1;
+	}
+}
+
 static int __devinit hpwdt_init_nmi_decoding(struct pci_dev *dev)
 {
 	int retval;
 
 	/*
-	 * We need to map the ROM to get the CRU service.
-	 * For 32 bit Operating Systems we need to go through the 32 Bit
-	 * BIOS Service Directory
-	 * For 64 bit Operating Systems we get that service through SMBIOS.
+	 * On typical CRU-based systems we need to map that service in
+	 * the BIOS. For 32 bit Operating Systems we need to go through
+	 * the 32 Bit BIOS Service Directory. For 64 bit Operating
+	 * Systems we get that service through SMBIOS.
+	 *
+	 * On systems that support the new iCRU service all we need to
+	 * do is call dmi_walk to get the supported flag value and skip
+	 * the old cru detect code.
 	 */
-	retval = detect_cru_service();
-	if (retval < 0) {
-		dev_warn(&dev->dev,
-			"Unable to detect the %d Bit CRU Service.\n",
-			HPWDT_ARCH);
-		return retval;
-	}
+	dmi_walk(dmi_find_icru, NULL);
+	if (!is_icru) {
+
+		/*
+		* We need to map the ROM to get the CRU service.
+		* For 32 bit Operating Systems we need to go through the 32 Bit
+		* BIOS Service Directory
+		* For 64 bit Operating Systems we get that service through SMBIOS.
+		*/
+		retval = detect_cru_service();
+		if (retval < 0) {
+			dev_warn(&dev->dev,
+				"Unable to detect the %d Bit CRU Service.\n",
+				HPWDT_ARCH);
+			return retval;
+		}
 
-	/*
-	 * We know this is the only CRU call we need to make so lets keep as
-	 * few instructions as possible once the NMI comes in.
-	 */
-	cmn_regs.u1.rah = 0x0D;
-	cmn_regs.u1.ral = 0x02;
+		/*
+		* We know this is the only CRU call we need to make so lets keep as
+		* few instructions as possible once the NMI comes in.
+		*/
+		cmn_regs.u1.rah = 0x0D;
+		cmn_regs.u1.ral = 0x02;
+	}
 
 	/*
 	 * If the priority is set to 1, then we will be put first on the
diff --git a/drivers/watchdog/iTCO_wdt.c b/drivers/watchdog/iTCO_wdt.c
index 5fd020da7c55..751a591684da 100644
--- a/drivers/watchdog/iTCO_wdt.c
+++ b/drivers/watchdog/iTCO_wdt.c
@@ -120,72 +120,12 @@ enum iTCO_chipsets {
 	TCO_3420,	/* 3420 */
 	TCO_3450,	/* 3450 */
 	TCO_EP80579,	/* EP80579 */
-	TCO_CPT1,	/* Cougar Point */
-	TCO_CPT2,	/* Cougar Point Desktop */
-	TCO_CPT3,	/* Cougar Point Mobile */
-	TCO_CPT4,	/* Cougar Point */
-	TCO_CPT5,	/* Cougar Point */
-	TCO_CPT6,	/* Cougar Point */
-	TCO_CPT7,	/* Cougar Point */
-	TCO_CPT8,	/* Cougar Point */
-	TCO_CPT9,	/* Cougar Point */
-	TCO_CPT10,	/* Cougar Point */
-	TCO_CPT11,	/* Cougar Point */
-	TCO_CPT12,	/* Cougar Point */
-	TCO_CPT13,	/* Cougar Point */
-	TCO_CPT14,	/* Cougar Point */
-	TCO_CPT15,	/* Cougar Point */
-	TCO_CPT16,	/* Cougar Point */
-	TCO_CPT17,	/* Cougar Point */
-	TCO_CPT18,	/* Cougar Point */
-	TCO_CPT19,	/* Cougar Point */
-	TCO_CPT20,	/* Cougar Point */
-	TCO_CPT21,	/* Cougar Point */
-	TCO_CPT22,	/* Cougar Point */
-	TCO_CPT23,	/* Cougar Point */
-	TCO_CPT24,	/* Cougar Point */
-	TCO_CPT25,	/* Cougar Point */
-	TCO_CPT26,	/* Cougar Point */
-	TCO_CPT27,	/* Cougar Point */
-	TCO_CPT28,	/* Cougar Point */
-	TCO_CPT29,	/* Cougar Point */
-	TCO_CPT30,	/* Cougar Point */
-	TCO_CPT31,	/* Cougar Point */
-	TCO_PBG1,	/* Patsburg */
-	TCO_PBG2,	/* Patsburg */
+	TCO_CPT,	/* Cougar Point */
+	TCO_CPTD,	/* Cougar Point Desktop */
+	TCO_CPTM,	/* Cougar Point Mobile */
+	TCO_PBG,	/* Patsburg */
 	TCO_DH89XXCC,	/* DH89xxCC */
-	TCO_PPT0,	/* Panther Point */
-	TCO_PPT1,	/* Panther Point */
-	TCO_PPT2,	/* Panther Point */
-	TCO_PPT3,	/* Panther Point */
-	TCO_PPT4,	/* Panther Point */
-	TCO_PPT5,	/* Panther Point */
-	TCO_PPT6,	/* Panther Point */
-	TCO_PPT7,	/* Panther Point */
-	TCO_PPT8,	/* Panther Point */
-	TCO_PPT9,	/* Panther Point */
-	TCO_PPT10,	/* Panther Point */
-	TCO_PPT11,	/* Panther Point */
-	TCO_PPT12,	/* Panther Point */
-	TCO_PPT13,	/* Panther Point */
-	TCO_PPT14,	/* Panther Point */
-	TCO_PPT15,	/* Panther Point */
-	TCO_PPT16,	/* Panther Point */
-	TCO_PPT17,	/* Panther Point */
-	TCO_PPT18,	/* Panther Point */
-	TCO_PPT19,	/* Panther Point */
-	TCO_PPT20,	/* Panther Point */
-	TCO_PPT21,	/* Panther Point */
-	TCO_PPT22,	/* Panther Point */
-	TCO_PPT23,	/* Panther Point */
-	TCO_PPT24,	/* Panther Point */
-	TCO_PPT25,	/* Panther Point */
-	TCO_PPT26,	/* Panther Point */
-	TCO_PPT27,	/* Panther Point */
-	TCO_PPT28,	/* Panther Point */
-	TCO_PPT29,	/* Panther Point */
-	TCO_PPT30,	/* Panther Point */
-	TCO_PPT31,	/* Panther Point */
+	TCO_PPT,	/* Panther Point */
 };
 
 static struct {
@@ -244,83 +184,14 @@ static struct {
 	{"3450", 2},
 	{"EP80579", 2},
 	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Cougar Point", 2},
-	{"Patsburg", 2},
+	{"Cougar Point Desktop", 2},
+	{"Cougar Point Mobile", 2},
 	{"Patsburg", 2},
 	{"DH89xxCC", 2},
 	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
-	{"Panther Point", 2},
 	{NULL, 0}
 };
 
-#define ITCO_PCI_DEVICE(dev, data) \
-	.vendor = PCI_VENDOR_ID_INTEL,	\
-	.device = dev,			\
-	.subvendor = PCI_ANY_ID,	\
-	.subdevice = PCI_ANY_ID,	\
-	.class = 0,			\
-	.class_mask = 0,		\
-	.driver_data = data
-
 /*
  * This data only exists for exporting the supported PCI ids
  * via MODULE_DEVICE_TABLE.  We do not actually register a
@@ -328,138 +199,138 @@ static struct {
  * functions that probably will be registered by other drivers.
  */
 static DEFINE_PCI_DEVICE_TABLE(iTCO_wdt_pci_tbl) = {
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801AA_0,	TCO_ICH)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801AB_0,	TCO_ICH0)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801BA_0,	TCO_ICH2)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801BA_10,	TCO_ICH2M)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801CA_0,	TCO_ICH3)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801CA_12,	TCO_ICH3M)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801DB_0,	TCO_ICH4)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801DB_12,	TCO_ICH4M)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801E_0,		TCO_CICH)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_82801EB_0,	TCO_ICH5)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ESB_1,		TCO_6300ESB)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_0,		TCO_ICH6)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_1,		TCO_ICH6M)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH6_2,		TCO_ICH6W)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ESB2_0,		TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x2671,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x2672,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x2673,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x2674,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x2675,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x2676,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x2677,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x2678,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x2679,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x267a,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x267b,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x267c,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x267d,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x267e,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(0x267f,				TCO_631XESB)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_0,		TCO_ICH7)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_30,		TCO_ICH7DH)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_1,		TCO_ICH7M)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH7_31,		TCO_ICH7MDH)},
-	{ ITCO_PCI_DEVICE(0x27bc,				TCO_NM10)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_0,		TCO_ICH8)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_2,		TCO_ICH8DH)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_3,		TCO_ICH8DO)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_4,		TCO_ICH8M)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH8_1,		TCO_ICH8ME)},
-	{ ITCO_PCI_DEVICE(0x2918,				TCO_ICH9)},
-	{ ITCO_PCI_DEVICE(0x2916,				TCO_ICH9R)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_2,		TCO_ICH9DH)},
-	{ ITCO_PCI_DEVICE(PCI_DEVICE_ID_INTEL_ICH9_4,		TCO_ICH9DO)},
-	{ ITCO_PCI_DEVICE(0x2919,				TCO_ICH9M)},
-	{ ITCO_PCI_DEVICE(0x2917,				TCO_ICH9ME)},
-	{ ITCO_PCI_DEVICE(0x3a18,				TCO_ICH10)},
-	{ ITCO_PCI_DEVICE(0x3a16,				TCO_ICH10R)},
-	{ ITCO_PCI_DEVICE(0x3a1a,				TCO_ICH10D)},
-	{ ITCO_PCI_DEVICE(0x3a14,				TCO_ICH10DO)},
-	{ ITCO_PCI_DEVICE(0x3b00,				TCO_PCH)},
-	{ ITCO_PCI_DEVICE(0x3b01,				TCO_PCHM)},
-	{ ITCO_PCI_DEVICE(0x3b02,				TCO_P55)},
-	{ ITCO_PCI_DEVICE(0x3b03,				TCO_PM55)},
-	{ ITCO_PCI_DEVICE(0x3b06,				TCO_H55)},
-	{ ITCO_PCI_DEVICE(0x3b07,				TCO_QM57)},
-	{ ITCO_PCI_DEVICE(0x3b08,				TCO_H57)},
-	{ ITCO_PCI_DEVICE(0x3b09,				TCO_HM55)},
-	{ ITCO_PCI_DEVICE(0x3b0a,				TCO_Q57)},
-	{ ITCO_PCI_DEVICE(0x3b0b,				TCO_HM57)},
-	{ ITCO_PCI_DEVICE(0x3b0d,				TCO_PCHMSFF)},
-	{ ITCO_PCI_DEVICE(0x3b0f,				TCO_QS57)},
-	{ ITCO_PCI_DEVICE(0x3b12,				TCO_3400)},
-	{ ITCO_PCI_DEVICE(0x3b14,				TCO_3420)},
-	{ ITCO_PCI_DEVICE(0x3b16,				TCO_3450)},
-	{ ITCO_PCI_DEVICE(0x5031,				TCO_EP80579)},
-	{ ITCO_PCI_DEVICE(0x1c41,				TCO_CPT1)},
-	{ ITCO_PCI_DEVICE(0x1c42,				TCO_CPT2)},
-	{ ITCO_PCI_DEVICE(0x1c43,				TCO_CPT3)},
-	{ ITCO_PCI_DEVICE(0x1c44,				TCO_CPT4)},
-	{ ITCO_PCI_DEVICE(0x1c45,				TCO_CPT5)},
-	{ ITCO_PCI_DEVICE(0x1c46,				TCO_CPT6)},
-	{ ITCO_PCI_DEVICE(0x1c47,				TCO_CPT7)},
-	{ ITCO_PCI_DEVICE(0x1c48,				TCO_CPT8)},
-	{ ITCO_PCI_DEVICE(0x1c49,				TCO_CPT9)},
-	{ ITCO_PCI_DEVICE(0x1c4a,				TCO_CPT10)},
-	{ ITCO_PCI_DEVICE(0x1c4b,				TCO_CPT11)},
-	{ ITCO_PCI_DEVICE(0x1c4c,				TCO_CPT12)},
-	{ ITCO_PCI_DEVICE(0x1c4d,				TCO_CPT13)},
-	{ ITCO_PCI_DEVICE(0x1c4e,				TCO_CPT14)},
-	{ ITCO_PCI_DEVICE(0x1c4f,				TCO_CPT15)},
-	{ ITCO_PCI_DEVICE(0x1c50,				TCO_CPT16)},
-	{ ITCO_PCI_DEVICE(0x1c51,				TCO_CPT17)},
-	{ ITCO_PCI_DEVICE(0x1c52,				TCO_CPT18)},
-	{ ITCO_PCI_DEVICE(0x1c53,				TCO_CPT19)},
-	{ ITCO_PCI_DEVICE(0x1c54,				TCO_CPT20)},
-	{ ITCO_PCI_DEVICE(0x1c55,				TCO_CPT21)},
-	{ ITCO_PCI_DEVICE(0x1c56,				TCO_CPT22)},
-	{ ITCO_PCI_DEVICE(0x1c57,				TCO_CPT23)},
-	{ ITCO_PCI_DEVICE(0x1c58,				TCO_CPT24)},
-	{ ITCO_PCI_DEVICE(0x1c59,				TCO_CPT25)},
-	{ ITCO_PCI_DEVICE(0x1c5a,				TCO_CPT26)},
-	{ ITCO_PCI_DEVICE(0x1c5b,				TCO_CPT27)},
-	{ ITCO_PCI_DEVICE(0x1c5c,				TCO_CPT28)},
-	{ ITCO_PCI_DEVICE(0x1c5d,				TCO_CPT29)},
-	{ ITCO_PCI_DEVICE(0x1c5e,				TCO_CPT30)},
-	{ ITCO_PCI_DEVICE(0x1c5f,				TCO_CPT31)},
-	{ ITCO_PCI_DEVICE(0x1d40,				TCO_PBG1)},
-	{ ITCO_PCI_DEVICE(0x1d41,				TCO_PBG2)},
-	{ ITCO_PCI_DEVICE(0x2310,				TCO_DH89XXCC)},
-	{ ITCO_PCI_DEVICE(0x1e40,				TCO_PPT0)},
-	{ ITCO_PCI_DEVICE(0x1e41,				TCO_PPT1)},
-	{ ITCO_PCI_DEVICE(0x1e42,				TCO_PPT2)},
-	{ ITCO_PCI_DEVICE(0x1e43,				TCO_PPT3)},
-	{ ITCO_PCI_DEVICE(0x1e44,				TCO_PPT4)},
-	{ ITCO_PCI_DEVICE(0x1e45,				TCO_PPT5)},
-	{ ITCO_PCI_DEVICE(0x1e46,				TCO_PPT6)},
-	{ ITCO_PCI_DEVICE(0x1e47,				TCO_PPT7)},
-	{ ITCO_PCI_DEVICE(0x1e48,				TCO_PPT8)},
-	{ ITCO_PCI_DEVICE(0x1e49,				TCO_PPT9)},
-	{ ITCO_PCI_DEVICE(0x1e4a,				TCO_PPT10)},
-	{ ITCO_PCI_DEVICE(0x1e4b,				TCO_PPT11)},
-	{ ITCO_PCI_DEVICE(0x1e4c,				TCO_PPT12)},
-	{ ITCO_PCI_DEVICE(0x1e4d,				TCO_PPT13)},
-	{ ITCO_PCI_DEVICE(0x1e4e,				TCO_PPT14)},
-	{ ITCO_PCI_DEVICE(0x1e4f,				TCO_PPT15)},
-	{ ITCO_PCI_DEVICE(0x1e50,				TCO_PPT16)},
-	{ ITCO_PCI_DEVICE(0x1e51,				TCO_PPT17)},
-	{ ITCO_PCI_DEVICE(0x1e52,				TCO_PPT18)},
-	{ ITCO_PCI_DEVICE(0x1e53,				TCO_PPT19)},
-	{ ITCO_PCI_DEVICE(0x1e54,				TCO_PPT20)},
-	{ ITCO_PCI_DEVICE(0x1e55,				TCO_PPT21)},
-	{ ITCO_PCI_DEVICE(0x1e56,				TCO_PPT22)},
-	{ ITCO_PCI_DEVICE(0x1e57,				TCO_PPT23)},
-	{ ITCO_PCI_DEVICE(0x1e58,				TCO_PPT24)},
-	{ ITCO_PCI_DEVICE(0x1e59,				TCO_PPT25)},
-	{ ITCO_PCI_DEVICE(0x1e5a,				TCO_PPT26)},
-	{ ITCO_PCI_DEVICE(0x1e5b,				TCO_PPT27)},
-	{ ITCO_PCI_DEVICE(0x1e5c,				TCO_PPT28)},
-	{ ITCO_PCI_DEVICE(0x1e5d,				TCO_PPT29)},
-	{ ITCO_PCI_DEVICE(0x1e5e,				TCO_PPT30)},
-	{ ITCO_PCI_DEVICE(0x1e5f,				TCO_PPT31)},
+	{ PCI_VDEVICE(INTEL, 0x2410), TCO_ICH},
+	{ PCI_VDEVICE(INTEL, 0x2420), TCO_ICH0},
+	{ PCI_VDEVICE(INTEL, 0x2440), TCO_ICH2},
+	{ PCI_VDEVICE(INTEL, 0x244c), TCO_ICH2M},
+	{ PCI_VDEVICE(INTEL, 0x2480), TCO_ICH3},
+	{ PCI_VDEVICE(INTEL, 0x248c), TCO_ICH3M},
+	{ PCI_VDEVICE(INTEL, 0x24c0), TCO_ICH4},
+	{ PCI_VDEVICE(INTEL, 0x24cc), TCO_ICH4M},
+	{ PCI_VDEVICE(INTEL, 0x2450), TCO_CICH},
+	{ PCI_VDEVICE(INTEL, 0x24d0), TCO_ICH5},
+	{ PCI_VDEVICE(INTEL, 0x25a1), TCO_6300ESB},
+	{ PCI_VDEVICE(INTEL, 0x2640), TCO_ICH6},
+	{ PCI_VDEVICE(INTEL, 0x2641), TCO_ICH6M},
+	{ PCI_VDEVICE(INTEL, 0x2642), TCO_ICH6W},
+	{ PCI_VDEVICE(INTEL, 0x2670), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x2671), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x2672), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x2673), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x2674), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x2675), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x2676), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x2677), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x2678), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x2679), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x267a), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x267b), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x267c), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x267d), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x267e), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x267f), TCO_631XESB},
+	{ PCI_VDEVICE(INTEL, 0x27b8), TCO_ICH7},
+	{ PCI_VDEVICE(INTEL, 0x27b0), TCO_ICH7DH},
+	{ PCI_VDEVICE(INTEL, 0x27b9), TCO_ICH7M},
+	{ PCI_VDEVICE(INTEL, 0x27bd), TCO_ICH7MDH},
+	{ PCI_VDEVICE(INTEL, 0x27bc), TCO_NM10},
+	{ PCI_VDEVICE(INTEL, 0x2810), TCO_ICH8},
+	{ PCI_VDEVICE(INTEL, 0x2812), TCO_ICH8DH},
+	{ PCI_VDEVICE(INTEL, 0x2814), TCO_ICH8DO},
+	{ PCI_VDEVICE(INTEL, 0x2815), TCO_ICH8M},
+	{ PCI_VDEVICE(INTEL, 0x2811), TCO_ICH8ME},
+	{ PCI_VDEVICE(INTEL, 0x2918), TCO_ICH9},
+	{ PCI_VDEVICE(INTEL, 0x2916), TCO_ICH9R},
+	{ PCI_VDEVICE(INTEL, 0x2912), TCO_ICH9DH},
+	{ PCI_VDEVICE(INTEL, 0x2914), TCO_ICH9DO},
+	{ PCI_VDEVICE(INTEL, 0x2919), TCO_ICH9M},
+	{ PCI_VDEVICE(INTEL, 0x2917), TCO_ICH9ME},
+	{ PCI_VDEVICE(INTEL, 0x3a18), TCO_ICH10},
+	{ PCI_VDEVICE(INTEL, 0x3a16), TCO_ICH10R},
+	{ PCI_VDEVICE(INTEL, 0x3a1a), TCO_ICH10D},
+	{ PCI_VDEVICE(INTEL, 0x3a14), TCO_ICH10DO},
+	{ PCI_VDEVICE(INTEL, 0x3b00), TCO_PCH},
+	{ PCI_VDEVICE(INTEL, 0x3b01), TCO_PCHM},
+	{ PCI_VDEVICE(INTEL, 0x3b02), TCO_P55},
+	{ PCI_VDEVICE(INTEL, 0x3b03), TCO_PM55},
+	{ PCI_VDEVICE(INTEL, 0x3b06), TCO_H55},
+	{ PCI_VDEVICE(INTEL, 0x3b07), TCO_QM57},
+	{ PCI_VDEVICE(INTEL, 0x3b08), TCO_H57},
+	{ PCI_VDEVICE(INTEL, 0x3b09), TCO_HM55},
+	{ PCI_VDEVICE(INTEL, 0x3b0a), TCO_Q57},
+	{ PCI_VDEVICE(INTEL, 0x3b0b), TCO_HM57},
+	{ PCI_VDEVICE(INTEL, 0x3b0d), TCO_PCHMSFF},
+	{ PCI_VDEVICE(INTEL, 0x3b0f), TCO_QS57},
+	{ PCI_VDEVICE(INTEL, 0x3b12), TCO_3400},
+	{ PCI_VDEVICE(INTEL, 0x3b14), TCO_3420},
+	{ PCI_VDEVICE(INTEL, 0x3b16), TCO_3450},
+	{ PCI_VDEVICE(INTEL, 0x5031), TCO_EP80579},
+	{ PCI_VDEVICE(INTEL, 0x1c41), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c42), TCO_CPTD},
+	{ PCI_VDEVICE(INTEL, 0x1c43), TCO_CPTM},
+	{ PCI_VDEVICE(INTEL, 0x1c44), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c45), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c46), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c47), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c48), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c49), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c4a), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c4b), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c4c), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c4d), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c4e), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c4f), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c50), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c51), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c52), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c53), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c54), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c55), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c56), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c57), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c58), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c59), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c5a), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c5b), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c5c), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c5d), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c5e), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1c5f), TCO_CPT},
+	{ PCI_VDEVICE(INTEL, 0x1d40), TCO_PBG},
+	{ PCI_VDEVICE(INTEL, 0x1d41), TCO_PBG},
+	{ PCI_VDEVICE(INTEL, 0x2310), TCO_DH89XXCC},
+	{ PCI_VDEVICE(INTEL, 0x1e40), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e41), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e42), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e43), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e44), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e45), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e46), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e47), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e48), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e49), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e4a), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e4b), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e4c), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e4d), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e4e), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e4f), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e50), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e51), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e52), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e53), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e54), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e55), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e56), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e57), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e58), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e59), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e5a), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e5b), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e5c), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e5d), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e5e), TCO_PPT},
+	{ PCI_VDEVICE(INTEL, 0x1e5f), TCO_PPT},
 	{ 0, },			/* End of list */
 };
 MODULE_DEVICE_TABLE(pci, iTCO_wdt_pci_tbl);
@@ -1052,15 +923,10 @@ static void iTCO_wdt_shutdown(struct platform_device *dev)
 	iTCO_wdt_stop();
 }
 
-#define iTCO_wdt_suspend NULL
-#define iTCO_wdt_resume  NULL
-
 static struct platform_driver iTCO_wdt_driver = {
 	.probe          = iTCO_wdt_probe,
 	.remove         = __devexit_p(iTCO_wdt_remove),
 	.shutdown       = iTCO_wdt_shutdown,
-	.suspend        = iTCO_wdt_suspend,
-	.resume         = iTCO_wdt_resume,
 	.driver         = {
 		.owner  = THIS_MODULE,
 		.name   = DRV_NAME,
diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
index 86f7cac1026c..b8ef2c6dca7c 100644
--- a/drivers/watchdog/imx2_wdt.c
+++ b/drivers/watchdog/imx2_wdt.c
@@ -329,12 +329,18 @@ static void imx2_wdt_shutdown(struct platform_device *pdev)
 	}
 }
 
+static const struct of_device_id imx2_wdt_dt_ids[] = {
+	{ .compatible = "fsl,imx21-wdt", },
+	{ /* sentinel */ }
+};
+
 static struct platform_driver imx2_wdt_driver = {
 	.remove		= __exit_p(imx2_wdt_remove),
 	.shutdown	= imx2_wdt_shutdown,
 	.driver		= {
 		.name	= DRIVER_NAME,
 		.owner	= THIS_MODULE,
+		.of_match_table = imx2_wdt_dt_ids,
 	},
 };
 
diff --git a/drivers/watchdog/intel_scu_watchdog.c b/drivers/watchdog/intel_scu_watchdog.c
index 919bdd16136f..1abdc0454c54 100644
--- a/drivers/watchdog/intel_scu_watchdog.c
+++ b/drivers/watchdog/intel_scu_watchdog.c
@@ -42,9 +42,8 @@
 #include <linux/sched.h>
 #include <linux/signal.h>
 #include <linux/sfi.h>
-#include <linux/types.h>
 #include <asm/irq.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 #include <asm/intel_scu_ipc.h>
 #include <asm/apb_timer.h>
 #include <asm/mrst.h>
diff --git a/drivers/watchdog/it8712f_wdt.c b/drivers/watchdog/it8712f_wdt.c
index 6143f52ba6b8..8d2d8502d3e8 100644
--- a/drivers/watchdog/it8712f_wdt.c
+++ b/drivers/watchdog/it8712f_wdt.c
@@ -28,10 +28,10 @@
 #include <linux/notifier.h>
 #include <linux/reboot.h>
 #include <linux/fs.h>
-#include <linux/pci.h>
 #include <linux/spinlock.h>
 #include <linux/uaccess.h>
 #include <linux/io.h>
+#include <linux/ioport.h>
 
 #define NAME "it8712f_wdt"
 
@@ -51,7 +51,6 @@ MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
 
 static unsigned long wdt_open;
 static unsigned expect_close;
-static spinlock_t io_lock;
 static unsigned char revision;
 
 /* Dog Food address - We use the game port address */
@@ -121,20 +120,26 @@ static inline void superio_select(int ldn)
 	outb(ldn, VAL);
 }
 
-static inline void superio_enter(void)
+static inline int superio_enter(void)
 {
-	spin_lock(&io_lock);
+	/*
+	 * Try to reserve REG and REG + 1 for exclusive access.
+	 */
+	if (!request_muxed_region(REG, 2, NAME))
+		return -EBUSY;
+
 	outb(0x87, REG);
 	outb(0x01, REG);
 	outb(0x55, REG);
 	outb(0x55, REG);
+	return 0;
 }
 
 static inline void superio_exit(void)
 {
 	outb(0x02, REG);
 	outb(0x02, VAL);
-	spin_unlock(&io_lock);
+	release_region(REG, 2);
 }
 
 static inline void it8712f_wdt_ping(void)
@@ -173,10 +178,13 @@ static int it8712f_wdt_get_status(void)
 		return 0;
 }
 
-static void it8712f_wdt_enable(void)
+static int it8712f_wdt_enable(void)
 {
+	int ret = superio_enter();
+	if (ret)
+		return ret;
+
 	printk(KERN_DEBUG NAME ": enabling watchdog timer\n");
-	superio_enter();
 	superio_select(LDN_GPIO);
 
 	superio_outb(wdt_control_reg, WDT_CONTROL);
@@ -186,13 +194,17 @@ static void it8712f_wdt_enable(void)
 	superio_exit();
 
 	it8712f_wdt_ping();
+
+	return 0;
 }
 
-static void it8712f_wdt_disable(void)
+static int it8712f_wdt_disable(void)
 {
-	printk(KERN_DEBUG NAME ": disabling watchdog timer\n");
+	int ret = superio_enter();
+	if (ret)
+		return ret;
 
-	superio_enter();
+	printk(KERN_DEBUG NAME ": disabling watchdog timer\n");
 	superio_select(LDN_GPIO);
 
 	superio_outb(0, WDT_CONFIG);
@@ -202,6 +214,7 @@ static void it8712f_wdt_disable(void)
 	superio_outb(0, WDT_TIMEOUT);
 
 	superio_exit();
+	return 0;
 }
 
 static int it8712f_wdt_notify(struct notifier_block *this,
@@ -252,6 +265,7 @@ static long it8712f_wdt_ioctl(struct file *file, unsigned int cmd,
 						WDIOF_MAGICCLOSE,
 	};
 	int value;
+	int ret;
 
 	switch (cmd) {
 	case WDIOC_GETSUPPORT:
@@ -259,7 +273,9 @@ static long it8712f_wdt_ioctl(struct file *file, unsigned int cmd,
 			return -EFAULT;
 		return 0;
 	case WDIOC_GETSTATUS:
-		superio_enter();
+		ret = superio_enter();
+		if (ret)
+			return ret;
 		superio_select(LDN_GPIO);
 
 		value = it8712f_wdt_get_status();
@@ -280,7 +296,9 @@ static long it8712f_wdt_ioctl(struct file *file, unsigned int cmd,
 		if (value > (max_units * 60))
 			return -EINVAL;
 		margin = value;
-		superio_enter();
+		ret = superio_enter();
+		if (ret)
+			return ret;
 		superio_select(LDN_GPIO);
 
 		it8712f_wdt_update_margin();
@@ -299,10 +317,14 @@ static long it8712f_wdt_ioctl(struct file *file, unsigned int cmd,
 
 static int it8712f_wdt_open(struct inode *inode, struct file *file)
 {
+	int ret;
 	/* only allow one at a time */
 	if (test_and_set_bit(0, &wdt_open))
 		return -EBUSY;
-	it8712f_wdt_enable();
+
+	ret = it8712f_wdt_enable();
+	if (ret)
+		return ret;
 	return nonseekable_open(inode, file);
 }
 
@@ -313,7 +335,8 @@ static int it8712f_wdt_release(struct inode *inode, struct file *file)
 			": watchdog device closed unexpectedly, will not"
 			" disable the watchdog timer\n");
 	} else if (!nowayout) {
-		it8712f_wdt_disable();
+		if (it8712f_wdt_disable())
+			printk(KERN_WARNING NAME "Watchdog disable failed\n");
 	}
 	expect_close = 0;
 	clear_bit(0, &wdt_open);
@@ -340,8 +363,10 @@ static int __init it8712f_wdt_find(unsigned short *address)
 {
 	int err = -ENODEV;
 	int chip_type;
+	int ret = superio_enter();
+	if (ret)
+		return ret;
 
-	superio_enter();
 	chip_type = superio_inw(DEVID);
 	if (chip_type != IT8712F_DEVID)
 		goto exit;
@@ -382,8 +407,6 @@ static int __init it8712f_wdt_init(void)
 {
 	int err = 0;
 
-	spin_lock_init(&io_lock);
-
 	if (it8712f_wdt_find(&address))
 		return -ENODEV;
 
@@ -392,7 +415,11 @@ static int __init it8712f_wdt_init(void)
 		return -EBUSY;
 	}
 
-	it8712f_wdt_disable();
+	err = it8712f_wdt_disable();
+	if (err) {
+		printk(KERN_ERR NAME ": unable to disable watchdog timer.\n");
+		goto out;
+	}
 
 	err = register_reboot_notifier(&it8712f_wdt_notifier);
 	if (err) {
diff --git a/drivers/watchdog/it87_wdt.c b/drivers/watchdog/it87_wdt.c
index b1bc72f9a209..a2d9a1266a23 100644
--- a/drivers/watchdog/it87_wdt.c
+++ b/drivers/watchdog/it87_wdt.c
@@ -137,7 +137,6 @@
 
 static	unsigned int base, gpact, ciract, max_units, chip_type;
 static	unsigned long wdt_status;
-static	DEFINE_SPINLOCK(spinlock);
 
 static	int nogameport = DEFAULT_NOGAMEPORT;
 static	int exclusive  = DEFAULT_EXCLUSIVE;
@@ -163,18 +162,26 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started, default="
 
 /* Superio Chip */
 
-static inline void superio_enter(void)
+static inline int superio_enter(void)
 {
+	/*
+	 * Try to reserve REG and REG + 1 for exclusive access.
+	 */
+	if (!request_muxed_region(REG, 2, WATCHDOG_NAME))
+		return -EBUSY;
+
 	outb(0x87, REG);
 	outb(0x01, REG);
 	outb(0x55, REG);
 	outb(0x55, REG);
+	return 0;
 }
 
 static inline void superio_exit(void)
 {
 	outb(0x02, REG);
 	outb(0x02, VAL);
+	release_region(REG, 2);
 }
 
 static inline void superio_select(int ldn)
@@ -255,12 +262,11 @@ static void wdt_keepalive(void)
 	set_bit(WDTS_KEEPALIVE, &wdt_status);
 }
 
-static void wdt_start(void)
+static int wdt_start(void)
 {
-	unsigned long flags;
-
-	spin_lock_irqsave(&spinlock, flags);
-	superio_enter();
+	int ret = superio_enter();
+	if (ret)
+		return ret;
 
 	superio_select(GPIO);
 	if (test_bit(WDTS_USE_GP, &wdt_status))
@@ -270,15 +276,15 @@ static void wdt_start(void)
 	wdt_update_timeout();
 
 	superio_exit();
-	spin_unlock_irqrestore(&spinlock, flags);
+
+	return 0;
 }
 
-static void wdt_stop(void)
+static int wdt_stop(void)
 {
-	unsigned long flags;
-
-	spin_lock_irqsave(&spinlock, flags);
-	superio_enter();
+	int ret = superio_enter();
+	if (ret)
+		return ret;
 
 	superio_select(GPIO);
 	superio_outb(0x00, WDTCTRL);
@@ -288,7 +294,7 @@ static void wdt_stop(void)
 		superio_outb(0x00, WDTVALMSB);
 
 	superio_exit();
-	spin_unlock_irqrestore(&spinlock, flags);
+	return 0;
 }
 
 /**
@@ -303,8 +309,6 @@ static void wdt_stop(void)
 
 static int wdt_set_timeout(int t)
 {
-	unsigned long flags;
-
 	if (t < 1 || t > max_units * 60)
 		return -EINVAL;
 
@@ -313,14 +317,15 @@ static int wdt_set_timeout(int t)
 	else
 		timeout = t;
 
-	spin_lock_irqsave(&spinlock, flags);
 	if (test_bit(WDTS_TIMER_RUN, &wdt_status)) {
-		superio_enter();
+		int ret = superio_enter();
+		if (ret)
+			return ret;
+
 		superio_select(GPIO);
 		wdt_update_timeout();
 		superio_exit();
 	}
-	spin_unlock_irqrestore(&spinlock, flags);
 	return 0;
 }
 
@@ -339,12 +344,12 @@ static int wdt_set_timeout(int t)
 
 static int wdt_get_status(int *status)
 {
-	unsigned long flags;
-
 	*status = 0;
 	if (testmode) {
-		spin_lock_irqsave(&spinlock, flags);
-		superio_enter();
+		int ret = superio_enter();
+		if (ret)
+			return ret;
+
 		superio_select(GPIO);
 		if (superio_inb(WDTCTRL) & WDT_ZERO) {
 			superio_outb(0x00, WDTCTRL);
@@ -353,7 +358,6 @@ static int wdt_get_status(int *status)
 		}
 
 		superio_exit();
-		spin_unlock_irqrestore(&spinlock, flags);
 	}
 	if (test_and_clear_bit(WDTS_KEEPALIVE, &wdt_status))
 		*status |= WDIOF_KEEPALIVEPING;
@@ -379,9 +383,17 @@ static int wdt_open(struct inode *inode, struct file *file)
 	if (exclusive && test_and_set_bit(WDTS_DEV_OPEN, &wdt_status))
 		return -EBUSY;
 	if (!test_and_set_bit(WDTS_TIMER_RUN, &wdt_status)) {
+		int ret;
 		if (nowayout && !test_and_set_bit(WDTS_LOCKED, &wdt_status))
 			__module_get(THIS_MODULE);
-		wdt_start();
+
+		ret = wdt_start();
+		if (ret) {
+			clear_bit(WDTS_LOCKED, &wdt_status);
+			clear_bit(WDTS_TIMER_RUN, &wdt_status);
+			clear_bit(WDTS_DEV_OPEN, &wdt_status);
+			return ret;
+		}
 	}
 	return nonseekable_open(inode, file);
 }
@@ -403,7 +415,16 @@ static int wdt_release(struct inode *inode, struct file *file)
 {
 	if (test_bit(WDTS_TIMER_RUN, &wdt_status)) {
 		if (test_and_clear_bit(WDTS_EXPECTED, &wdt_status)) {
-			wdt_stop();
+			int ret = wdt_stop();
+			if (ret) {
+				/*
+				 * Stop failed. Just keep the watchdog alive
+				 * and hope nothing bad happens.
+				 */
+				set_bit(WDTS_EXPECTED, &wdt_status);
+				wdt_keepalive();
+				return ret;
+			}
 			clear_bit(WDTS_TIMER_RUN, &wdt_status);
 		} else {
 			wdt_keepalive();
@@ -484,7 +505,9 @@ static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 				    &ident, sizeof(ident)) ? -EFAULT : 0;
 
 	case WDIOC_GETSTATUS:
-		wdt_get_status(&status);
+		rc = wdt_get_status(&status);
+		if (rc)
+			return rc;
 		return put_user(status, uarg.i);
 
 	case WDIOC_GETBOOTSTATUS:
@@ -500,14 +523,22 @@ static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 		switch (new_options) {
 		case WDIOS_DISABLECARD:
-			if (test_bit(WDTS_TIMER_RUN, &wdt_status))
-				wdt_stop();
+			if (test_bit(WDTS_TIMER_RUN, &wdt_status)) {
+				rc = wdt_stop();
+				if (rc)
+					return rc;
+			}
 			clear_bit(WDTS_TIMER_RUN, &wdt_status);
 			return 0;
 
 		case WDIOS_ENABLECARD:
-			if (!test_and_set_bit(WDTS_TIMER_RUN, &wdt_status))
-				wdt_start();
+			if (!test_and_set_bit(WDTS_TIMER_RUN, &wdt_status)) {
+				rc = wdt_start();
+				if (rc) {
+					clear_bit(WDTS_TIMER_RUN, &wdt_status);
+					return rc;
+				}
+			}
 			return 0;
 
 		default:
@@ -560,16 +591,17 @@ static int __init it87_wdt_init(void)
 	int rc = 0;
 	int try_gameport = !nogameport;
 	u8  chip_rev;
-	unsigned long flags;
+	int gp_rreq_fail = 0;
 
 	wdt_status = 0;
 
-	spin_lock_irqsave(&spinlock, flags);
-	superio_enter();
+	rc = superio_enter();
+	if (rc)
+		return rc;
+
 	chip_type = superio_inw(CHIPID);
 	chip_rev  = superio_inb(CHIPREV) & 0x0f;
 	superio_exit();
-	spin_unlock_irqrestore(&spinlock, flags);
 
 	switch (chip_type) {
 	case IT8702_ID:
@@ -603,8 +635,9 @@ static int __init it87_wdt_init(void)
 		return -ENODEV;
 	}
 
-	spin_lock_irqsave(&spinlock, flags);
-	superio_enter();
+	rc = superio_enter();
+	if (rc)
+		return rc;
 
 	superio_select(GPIO);
 	superio_outb(WDT_TOV1, WDTCFG);
@@ -620,21 +653,16 @@ static int __init it87_wdt_init(void)
 		}
 		gpact = superio_inb(ACTREG);
 		superio_outb(0x01, ACTREG);
-		superio_exit();
-		spin_unlock_irqrestore(&spinlock, flags);
 		if (request_region(base, 1, WATCHDOG_NAME))
 			set_bit(WDTS_USE_GP, &wdt_status);
 		else
-			rc = -EIO;
-	} else {
-		superio_exit();
-		spin_unlock_irqrestore(&spinlock, flags);
+			gp_rreq_fail = 1;
 	}
 
 	/* If we haven't Gameport support, try to get CIR support */
 	if (!test_bit(WDTS_USE_GP, &wdt_status)) {
 		if (!request_region(CIR_BASE, 8, WATCHDOG_NAME)) {
-			if (rc == -EIO)
+			if (gp_rreq_fail)
 				printk(KERN_ERR PFX
 					"I/O Address 0x%04x and 0x%04x"
 					" already in use\n", base, CIR_BASE);
@@ -646,21 +674,16 @@ static int __init it87_wdt_init(void)
 			goto err_out;
 		}
 		base = CIR_BASE;
-		spin_lock_irqsave(&spinlock, flags);
-		superio_enter();
 
 		superio_select(CIR);
 		superio_outw(base, BASEREG);
 		superio_outb(0x00, CIR_ILS);
 		ciract = superio_inb(ACTREG);
 		superio_outb(0x01, ACTREG);
-		if (rc == -EIO) {
+		if (gp_rreq_fail) {
 			superio_select(GAMEPORT);
 			superio_outb(gpact, ACTREG);
 		}
-
-		superio_exit();
-		spin_unlock_irqrestore(&spinlock, flags);
 	}
 
 	if (timeout < 1 || timeout > max_units * 60) {
@@ -704,6 +727,7 @@ static int __init it87_wdt_init(void)
 		"nogameport=%d)\n", chip_type, chip_rev, timeout,
 		nowayout, testmode, exclusive, nogameport);
 
+	superio_exit();
 	return 0;
 
 err_out_reboot:
@@ -711,49 +735,37 @@ err_out_reboot:
 err_out_region:
 	release_region(base, test_bit(WDTS_USE_GP, &wdt_status) ? 1 : 8);
 	if (!test_bit(WDTS_USE_GP, &wdt_status)) {
-		spin_lock_irqsave(&spinlock, flags);
-		superio_enter();
 		superio_select(CIR);
 		superio_outb(ciract, ACTREG);
-		superio_exit();
-		spin_unlock_irqrestore(&spinlock, flags);
 	}
 err_out:
 	if (try_gameport) {
-		spin_lock_irqsave(&spinlock, flags);
-		superio_enter();
 		superio_select(GAMEPORT);
 		superio_outb(gpact, ACTREG);
-		superio_exit();
-		spin_unlock_irqrestore(&spinlock, flags);
 	}
 
+	superio_exit();
 	return rc;
 }
 
 static void __exit it87_wdt_exit(void)
 {
-	unsigned long flags;
-	int nolock;
-
-	nolock = !spin_trylock_irqsave(&spinlock, flags);
-	superio_enter();
-	superio_select(GPIO);
-	superio_outb(0x00, WDTCTRL);
-	superio_outb(0x00, WDTCFG);
-	superio_outb(0x00, WDTVALLSB);
-	if (max_units > 255)
-		superio_outb(0x00, WDTVALMSB);
-	if (test_bit(WDTS_USE_GP, &wdt_status)) {
-		superio_select(GAMEPORT);
-		superio_outb(gpact, ACTREG);
-	} else {
-		superio_select(CIR);
-		superio_outb(ciract, ACTREG);
+	if (superio_enter() == 0) {
+		superio_select(GPIO);
+		superio_outb(0x00, WDTCTRL);
+		superio_outb(0x00, WDTCFG);
+		superio_outb(0x00, WDTVALLSB);
+		if (max_units > 255)
+			superio_outb(0x00, WDTVALMSB);
+		if (test_bit(WDTS_USE_GP, &wdt_status)) {
+			superio_select(GAMEPORT);
+			superio_outb(gpact, ACTREG);
+		} else {
+			superio_select(CIR);
+			superio_outb(ciract, ACTREG);
+		}
+		superio_exit();
 	}
-	superio_exit();
-	if (!nolock)
-		spin_unlock_irqrestore(&spinlock, flags);
 
 	misc_deregister(&wdt_miscdev);
 	unregister_reboot_notifier(&wdt_notifier);
diff --git a/drivers/watchdog/mpcore_wdt.c b/drivers/watchdog/mpcore_wdt.c
index 2b4af222b5f2..4dc31024d26c 100644
--- a/drivers/watchdog/mpcore_wdt.c
+++ b/drivers/watchdog/mpcore_wdt.c
@@ -407,12 +407,35 @@ static int __devexit mpcore_wdt_remove(struct platform_device *dev)
 	return 0;
 }
 
+#ifdef CONFIG_PM
+static int mpcore_wdt_suspend(struct platform_device *dev, pm_message_t msg)
+{
+	struct mpcore_wdt *wdt = platform_get_drvdata(dev);
+	mpcore_wdt_stop(wdt);		/* Turn the WDT off */
+	return 0;
+}
+
+static int mpcore_wdt_resume(struct platform_device *dev)
+{
+	struct mpcore_wdt *wdt = platform_get_drvdata(dev);
+	/* re-activate timer */
+	if (test_bit(0, &wdt->timer_alive))
+		mpcore_wdt_start(wdt);
+	return 0;
+}
+#else
+#define mpcore_wdt_suspend	NULL
+#define mpcore_wdt_resume	NULL
+#endif
+
 /* work with hotplug and coldplug */
 MODULE_ALIAS("platform:mpcore_wdt");
 
 static struct platform_driver mpcore_wdt_driver = {
 	.probe		= mpcore_wdt_probe,
 	.remove		= __devexit_p(mpcore_wdt_remove),
+	.suspend	= mpcore_wdt_suspend,
+	.resume		= mpcore_wdt_resume,
 	.shutdown	= mpcore_wdt_shutdown,
 	.driver		= {
 		.owner	= THIS_MODULE,
diff --git a/drivers/watchdog/mtx-1_wdt.c b/drivers/watchdog/mtx-1_wdt.c
index 1479dc4d6129..ac37bb82392c 100644
--- a/drivers/watchdog/mtx-1_wdt.c
+++ b/drivers/watchdog/mtx-1_wdt.c
@@ -66,23 +66,18 @@ static struct {
 	int default_ticks;
 	unsigned long inuse;
 	unsigned gpio;
-	int gstate;
+	unsigned int gstate;
 } mtx1_wdt_device;
 
 static void mtx1_wdt_trigger(unsigned long unused)
 {
-	u32 tmp;
-
 	spin_lock(&mtx1_wdt_device.lock);
 	if (mtx1_wdt_device.running)
 		ticks--;
 
 	/* toggle wdt gpio */
-	mtx1_wdt_device.gstate = ~mtx1_wdt_device.gstate;
-	if (mtx1_wdt_device.gstate)
-		gpio_direction_output(mtx1_wdt_device.gpio, 1);
-	else
-		gpio_direction_input(mtx1_wdt_device.gpio);
+	mtx1_wdt_device.gstate = !mtx1_wdt_device.gstate;
+	gpio_set_value(mtx1_wdt_device.gpio, mtx1_wdt_device.gstate);
 
 	if (mtx1_wdt_device.queue && ticks)
 		mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
@@ -105,7 +100,7 @@ static void mtx1_wdt_start(void)
 	if (!mtx1_wdt_device.queue) {
 		mtx1_wdt_device.queue = 1;
 		mtx1_wdt_device.gstate = 1;
-		gpio_direction_output(mtx1_wdt_device.gpio, 1);
+		gpio_set_value(mtx1_wdt_device.gpio, 1);
 		mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL);
 	}
 	mtx1_wdt_device.running++;
@@ -120,7 +115,7 @@ static int mtx1_wdt_stop(void)
 	if (mtx1_wdt_device.queue) {
 		mtx1_wdt_device.queue = 0;
 		mtx1_wdt_device.gstate = 0;
-		gpio_direction_output(mtx1_wdt_device.gpio, 0);
+		gpio_set_value(mtx1_wdt_device.gpio, 0);
 	}
 	ticks = mtx1_wdt_device.default_ticks;
 	spin_unlock_irqrestore(&mtx1_wdt_device.lock, flags);
@@ -214,6 +209,12 @@ static int __devinit mtx1_wdt_probe(struct platform_device *pdev)
 	int ret;
 
 	mtx1_wdt_device.gpio = pdev->resource[0].start;
+	ret = gpio_request_one(mtx1_wdt_device.gpio,
+				GPIOF_OUT_INIT_HIGH, "mtx1-wdt");
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to request gpio");
+		return ret;
+	}
 
 	spin_lock_init(&mtx1_wdt_device.lock);
 	init_completion(&mtx1_wdt_device.stop);
@@ -224,11 +225,11 @@ static int __devinit mtx1_wdt_probe(struct platform_device *pdev)
 
 	ret = misc_register(&mtx1_wdt_misc);
 	if (ret < 0) {
-		printk(KERN_ERR " mtx-1_wdt : failed to register\n");
+		dev_err(&pdev->dev, "failed to register\n");
 		return ret;
 	}
 	mtx1_wdt_start();
-	printk(KERN_INFO "MTX-1 Watchdog driver\n");
+	dev_info(&pdev->dev, "MTX-1 Watchdog driver\n");
 	return 0;
 }
 
@@ -239,11 +240,13 @@ static int __devexit mtx1_wdt_remove(struct platform_device *pdev)
 		mtx1_wdt_device.queue = 0;
 		wait_for_completion(&mtx1_wdt_device.stop);
 	}
+
+	gpio_free(mtx1_wdt_device.gpio);
 	misc_deregister(&mtx1_wdt_misc);
 	return 0;
 }
 
-static struct platform_driver mtx1_wdt = {
+static struct platform_driver mtx1_wdt_driver = {
 	.probe = mtx1_wdt_probe,
 	.remove = __devexit_p(mtx1_wdt_remove),
 	.driver.name = "mtx1-wdt",
@@ -252,12 +255,12 @@ static struct platform_driver mtx1_wdt = {
 
 static int __init mtx1_wdt_init(void)
 {
-	return platform_driver_register(&mtx1_wdt);
+	return platform_driver_register(&mtx1_wdt_driver);
 }
 
 static void __exit mtx1_wdt_exit(void)
 {
-	platform_driver_unregister(&mtx1_wdt);
+	platform_driver_unregister(&mtx1_wdt_driver);
 }
 
 module_init(mtx1_wdt_init);
diff --git a/drivers/watchdog/nv_tco.c b/drivers/watchdog/nv_tco.c
index afa78a54711e..809f41c30c44 100644
--- a/drivers/watchdog/nv_tco.c
+++ b/drivers/watchdog/nv_tco.c
@@ -458,7 +458,15 @@ static int __devexit nv_tco_remove(struct platform_device *dev)
 
 static void nv_tco_shutdown(struct platform_device *dev)
 {
+	u32 val;
+
 	tco_timer_stop();
+
+	/* Some BIOSes fail the POST (once) if the NO_REBOOT flag is not
+	 * unset during shutdown. */
+	pci_read_config_dword(tco_pci, MCP51_SMBUS_SETUP_B, &val);
+	val &= ~MCP51_SMBUS_SETUP_B_TCO_REBOOT;
+	pci_write_config_dword(tco_pci, MCP51_SMBUS_SETUP_B, val);
 }
 
 static struct platform_driver nv_tco_driver = {
diff --git a/drivers/watchdog/of_xilinx_wdt.c b/drivers/watchdog/of_xilinx_wdt.c
new file mode 100644
index 000000000000..4ec741ac952c
--- /dev/null
+++ b/drivers/watchdog/of_xilinx_wdt.c
@@ -0,0 +1,433 @@
+/*
+*   of_xilinx_wdt.c  1.01  A Watchdog Device Driver for Xilinx xps_timebase_wdt
+*
+*   (C) Copyright 2011 (Alejandro Cabrera <aldaya@gmail.com>)
+*
+*       -----------------------
+*
+*   This program is free software; you can redistribute it and/or
+*   modify it under the terms of the GNU General Public License
+*   as published by the Free Software Foundation; either version
+*   2 of the License, or (at your option) any later version.
+*
+*       -----------------------
+*	30-May-2011 Alejandro Cabrera <aldaya@gmail.com>
+*		- If "xlnx,wdt-enable-once" wasn't found on device tree the
+*		  module will use CONFIG_WATCHDOG_NOWAYOUT
+*		- If the device tree parameters ("clock-frequency" and
+*		  "xlnx,wdt-interval") wasn't found the driver won't
+*		  know the wdt reset interval
+*/
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/watchdog.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+
+/* Register offsets for the Wdt device */
+#define XWT_TWCSR0_OFFSET   0x0 /* Control/Status Register0 */
+#define XWT_TWCSR1_OFFSET   0x4 /* Control/Status Register1 */
+#define XWT_TBR_OFFSET      0x8 /* Timebase Register Offset */
+
+/* Control/Status Register Masks  */
+#define XWT_CSR0_WRS_MASK   0x00000008 /* Reset status */
+#define XWT_CSR0_WDS_MASK   0x00000004 /* Timer state  */
+#define XWT_CSR0_EWDT1_MASK 0x00000002 /* Enable bit 1 */
+
+/* Control/Status Register 0/1 bits  */
+#define XWT_CSRX_EWDT2_MASK 0x00000001 /* Enable bit 2 */
+
+/* SelfTest constants */
+#define XWT_MAX_SELFTEST_LOOP_COUNT 0x00010000
+#define XWT_TIMER_FAILED            0xFFFFFFFF
+
+#define WATCHDOG_NAME     "Xilinx Watchdog"
+#define PFX WATCHDOG_NAME ": "
+
+struct xwdt_device {
+	struct resource  res;
+	void __iomem *base;
+	u32 nowayout;
+	u32 wdt_interval;
+	u32 boot_status;
+};
+
+static struct xwdt_device xdev;
+
+static  u32 timeout;
+static  u32 control_status_reg;
+static  u8  expect_close;
+static  u8  no_timeout;
+static unsigned long driver_open;
+
+static  DEFINE_SPINLOCK(spinlock);
+
+static void xwdt_start(void)
+{
+	spin_lock(&spinlock);
+
+	/* Clean previous status and enable the watchdog timer */
+	control_status_reg = ioread32(xdev.base + XWT_TWCSR0_OFFSET);
+	control_status_reg |= (XWT_CSR0_WRS_MASK | XWT_CSR0_WDS_MASK);
+
+	iowrite32((control_status_reg | XWT_CSR0_EWDT1_MASK),
+				xdev.base + XWT_TWCSR0_OFFSET);
+
+	iowrite32(XWT_CSRX_EWDT2_MASK, xdev.base + XWT_TWCSR1_OFFSET);
+
+	spin_unlock(&spinlock);
+}
+
+static void xwdt_stop(void)
+{
+	spin_lock(&spinlock);
+
+	control_status_reg = ioread32(xdev.base + XWT_TWCSR0_OFFSET);
+
+	iowrite32((control_status_reg & ~XWT_CSR0_EWDT1_MASK),
+				xdev.base + XWT_TWCSR0_OFFSET);
+
+	iowrite32(0, xdev.base + XWT_TWCSR1_OFFSET);
+
+	spin_unlock(&spinlock);
+	printk(KERN_INFO PFX "Stopped!\n");
+}
+
+static void xwdt_keepalive(void)
+{
+	spin_lock(&spinlock);
+
+	control_status_reg = ioread32(xdev.base + XWT_TWCSR0_OFFSET);
+	control_status_reg |= (XWT_CSR0_WRS_MASK | XWT_CSR0_WDS_MASK);
+	iowrite32(control_status_reg, xdev.base + XWT_TWCSR0_OFFSET);
+
+	spin_unlock(&spinlock);
+}
+
+static void xwdt_get_status(int *status)
+{
+	int new_status;
+
+	spin_lock(&spinlock);
+
+	control_status_reg = ioread32(xdev.base + XWT_TWCSR0_OFFSET);
+	new_status = ((control_status_reg &
+			(XWT_CSR0_WRS_MASK | XWT_CSR0_WDS_MASK)) != 0);
+	spin_unlock(&spinlock);
+
+	*status = 0;
+	if (new_status & 1)
+		*status |= WDIOF_CARDRESET;
+}
+
+static u32 xwdt_selftest(void)
+{
+	int i;
+	u32 timer_value1;
+	u32 timer_value2;
+
+	spin_lock(&spinlock);
+
+	timer_value1 = ioread32(xdev.base + XWT_TBR_OFFSET);
+	timer_value2 = ioread32(xdev.base + XWT_TBR_OFFSET);
+
+	for (i = 0;
+		((i <= XWT_MAX_SELFTEST_LOOP_COUNT) &&
+			(timer_value2 == timer_value1)); i++) {
+		timer_value2 = ioread32(xdev.base + XWT_TBR_OFFSET);
+	}
+
+	spin_unlock(&spinlock);
+
+	if (timer_value2 != timer_value1)
+		return ~XWT_TIMER_FAILED;
+	else
+		return XWT_TIMER_FAILED;
+}
+
+static int xwdt_open(struct inode *inode, struct file *file)
+{
+	/* Only one process can handle the wdt at a time */
+	if (test_and_set_bit(0, &driver_open))
+		return -EBUSY;
+
+	/* Make sure that the module are always loaded...*/
+	if (xdev.nowayout)
+		__module_get(THIS_MODULE);
+
+	xwdt_start();
+	printk(KERN_INFO PFX "Started...\n");
+
+	return nonseekable_open(inode, file);
+}
+
+static int xwdt_release(struct inode *inode, struct file *file)
+{
+	if (expect_close == 42) {
+		xwdt_stop();
+	} else {
+		printk(KERN_CRIT PFX
+			"Unexpected close, not stopping watchdog!\n");
+		xwdt_keepalive();
+	}
+
+	clear_bit(0, &driver_open);
+	expect_close = 0;
+	return 0;
+}
+
+/*
+ *      xwdt_write:
+ *      @file: file handle to the watchdog
+ *      @buf: buffer to write (unused as data does not matter here
+ *      @count: count of bytes
+ *      @ppos: pointer to the position to write. No seeks allowed
+ *
+ *      A write to a watchdog device is defined as a keepalive signal. Any
+ *      write of data will do, as we don't define content meaning.
+ */
+static ssize_t xwdt_write(struct file *file, const char __user *buf,
+						size_t len, loff_t *ppos)
+{
+	if (len) {
+		if (!xdev.nowayout) {
+			size_t i;
+
+			/* In case it was set long ago */
+			expect_close = 0;
+
+			for (i = 0; i != len; i++) {
+				char c;
+
+				if (get_user(c, buf + i))
+					return -EFAULT;
+				if (c == 'V')
+					expect_close = 42;
+			}
+		}
+		xwdt_keepalive();
+	}
+	return len;
+}
+
+static const struct watchdog_info ident = {
+	.options =  WDIOF_MAGICCLOSE |
+		    WDIOF_KEEPALIVEPING,
+	.firmware_version =	1,
+	.identity =	WATCHDOG_NAME,
+};
+
+/*
+ *      xwdt_ioctl:
+ *      @file: file handle to the device
+ *      @cmd: watchdog command
+ *      @arg: argument pointer
+ *
+ *      The watchdog API defines a common set of functions for all watchdogs
+ *      according to their available features.
+ */
+static long xwdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	int status;
+
+	union {
+		struct watchdog_info __user *ident;
+		int __user *i;
+	} uarg;
+
+	uarg.i = (int __user *)arg;
+
+	switch (cmd) {
+	case WDIOC_GETSUPPORT:
+		return copy_to_user(uarg.ident, &ident,
+					sizeof(ident)) ? -EFAULT : 0;
+
+	case WDIOC_GETBOOTSTATUS:
+		return put_user(xdev.boot_status, uarg.i);
+
+	case WDIOC_GETSTATUS:
+		xwdt_get_status(&status);
+		return put_user(status, uarg.i);
+
+	case WDIOC_KEEPALIVE:
+		xwdt_keepalive();
+		return 0;
+
+	case WDIOC_GETTIMEOUT:
+		if (no_timeout)
+			return -ENOTTY;
+		else
+			return put_user(timeout, uarg.i);
+
+	default:
+		return -ENOTTY;
+	}
+}
+
+static const struct file_operations xwdt_fops = {
+	.owner      = THIS_MODULE,
+	.llseek     = no_llseek,
+	.write      = xwdt_write,
+	.open       = xwdt_open,
+	.release    = xwdt_release,
+	.unlocked_ioctl = xwdt_ioctl,
+};
+
+static struct miscdevice xwdt_miscdev = {
+	.minor      = WATCHDOG_MINOR,
+	.name       = "watchdog",
+	.fops       = &xwdt_fops,
+};
+
+static int __devinit xwdt_probe(struct platform_device *pdev)
+{
+	int rc;
+	u32 *tmptr;
+	u32 *pfreq;
+
+	no_timeout = 0;
+
+	pfreq = (u32 *)of_get_property(pdev->dev.of_node->parent,
+					"clock-frequency", NULL);
+
+	if (pfreq == NULL) {
+		printk(KERN_WARNING PFX
+			"The watchdog clock frequency cannot be obtained!\n");
+		no_timeout = 1;
+	}
+
+	rc = of_address_to_resource(pdev->dev.of_node, 0, &xdev.res);
+	if (rc) {
+		printk(KERN_WARNING PFX "invalid address!\n");
+		return rc;
+	}
+
+	tmptr = (u32 *)of_get_property(pdev->dev.of_node,
+					"xlnx,wdt-interval", NULL);
+	if (tmptr == NULL) {
+		printk(KERN_WARNING PFX "Parameter \"xlnx,wdt-interval\""
+					" not found in device tree!\n");
+		no_timeout = 1;
+	} else {
+		xdev.wdt_interval = *tmptr;
+	}
+
+	tmptr = (u32 *)of_get_property(pdev->dev.of_node,
+					"xlnx,wdt-enable-once", NULL);
+	if (tmptr == NULL) {
+		printk(KERN_WARNING PFX "Parameter \"xlnx,wdt-enable-once\""
+					" not found in device tree!\n");
+		xdev.nowayout = WATCHDOG_NOWAYOUT;
+	}
+
+/*
+ *  Twice of the 2^wdt_interval / freq  because the first wdt overflow is
+ *  ignored (interrupt), reset is only generated at second wdt overflow
+ */
+	if (!no_timeout)
+		timeout = 2 * ((1<<xdev.wdt_interval) / *pfreq);
+
+	if (!request_mem_region(xdev.res.start,
+			xdev.res.end - xdev.res.start + 1, WATCHDOG_NAME)) {
+		rc = -ENXIO;
+		printk(KERN_ERR PFX "memory request failure!\n");
+		goto err_out;
+	}
+
+	xdev.base = ioremap(xdev.res.start, xdev.res.end - xdev.res.start + 1);
+	if (xdev.base == NULL) {
+		rc = -ENOMEM;
+		printk(KERN_ERR PFX "ioremap failure!\n");
+		goto release_mem;
+	}
+
+	rc = xwdt_selftest();
+	if (rc == XWT_TIMER_FAILED) {
+		printk(KERN_ERR PFX "SelfTest routine error!\n");
+		goto unmap_io;
+	}
+
+	xwdt_get_status(&xdev.boot_status);
+
+	rc = misc_register(&xwdt_miscdev);
+	if (rc) {
+		printk(KERN_ERR PFX
+			"cannot register miscdev on minor=%d (err=%d)\n",
+						xwdt_miscdev.minor, rc);
+		goto unmap_io;
+	}
+
+	if (no_timeout)
+		printk(KERN_INFO PFX
+			"driver loaded (timeout=? sec, nowayout=%d)\n",
+						    xdev.nowayout);
+	else
+		printk(KERN_INFO PFX
+			"driver loaded (timeout=%d sec, nowayout=%d)\n",
+					timeout, xdev.nowayout);
+
+	expect_close = 0;
+	clear_bit(0, &driver_open);
+
+	return 0;
+
+unmap_io:
+	iounmap(xdev.base);
+release_mem:
+	release_mem_region(xdev.res.start, resource_size(&xdev.res));
+err_out:
+	return rc;
+}
+
+static int __devexit xwdt_remove(struct platform_device *dev)
+{
+	misc_deregister(&xwdt_miscdev);
+	iounmap(xdev.base);
+	release_mem_region(xdev.res.start, resource_size(&xdev.res));
+
+	return 0;
+}
+
+/* Match table for of_platform binding */
+static struct of_device_id __devinitdata xwdt_of_match[] = {
+	{ .compatible = "xlnx,xps-timebase-wdt-1.01.a", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, xwdt_of_match);
+
+static struct platform_driver xwdt_driver = {
+	.probe       = xwdt_probe,
+	.remove      = __devexit_p(xwdt_remove),
+	.driver = {
+		.owner = THIS_MODULE,
+		.name  = WATCHDOG_NAME,
+		.of_match_table = xwdt_of_match,
+	},
+};
+
+static int __init xwdt_init(void)
+{
+	return platform_driver_register(&xwdt_driver);
+}
+
+static void __exit xwdt_exit(void)
+{
+	platform_driver_unregister(&xwdt_driver);
+}
+
+module_init(xwdt_init);
+module_exit(xwdt_exit);
+
+MODULE_AUTHOR("Alejandro Cabrera <aldaya@gmail.com>");
+MODULE_DESCRIPTION("Xilinx Watchdog driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
diff --git a/drivers/watchdog/pc87413_wdt.c b/drivers/watchdog/pc87413_wdt.c
index b7c139051575..e78d89986768 100644
--- a/drivers/watchdog/pc87413_wdt.c
+++ b/drivers/watchdog/pc87413_wdt.c
@@ -56,6 +56,7 @@
 #define IO_DEFAULT	0x2E		/* Address used on Portwell Boards */
 
 static int io = IO_DEFAULT;
+static int swc_base_addr = -1;
 
 static int timeout = DEFAULT_TIMEOUT;	/* timeout value */
 static unsigned long timer_enabled;	/* is the timer enabled? */
@@ -116,9 +117,8 @@ static inline void pc87413_enable_swc(void)
 
 /* Read SWC I/O base address */
 
-static inline unsigned int pc87413_get_swc_base(void)
+static void pc87413_get_swc_base_addr(void)
 {
-	unsigned int  swc_base_addr = 0;
 	unsigned char addr_l, addr_h = 0;
 
 	/* Step 3: Read SWC I/O Base Address */
@@ -136,12 +136,11 @@ static inline unsigned int pc87413_get_swc_base(void)
 		"Read SWC I/O Base Address: low %d, high %d, res %d\n",
 						addr_l, addr_h, swc_base_addr);
 #endif
-	return swc_base_addr;
 }
 
 /* Select Bank 3 of SWC */
 
-static inline void pc87413_swc_bank3(unsigned int swc_base_addr)
+static inline void pc87413_swc_bank3(void)
 {
 	/* Step 4: Select Bank3 of SWC */
 	outb_p(inb(swc_base_addr + 0x0f) | 0x03, swc_base_addr + 0x0f);
@@ -152,8 +151,7 @@ static inline void pc87413_swc_bank3(unsigned int swc_base_addr)
 
 /* Set watchdog timeout to x minutes */
 
-static inline void pc87413_programm_wdto(unsigned int swc_base_addr,
-					 char pc87413_time)
+static inline void pc87413_programm_wdto(char pc87413_time)
 {
 	/* Step 5: Programm WDTO, Twd. */
 	outb_p(pc87413_time, swc_base_addr + WDTO);
@@ -164,7 +162,7 @@ static inline void pc87413_programm_wdto(unsigned int swc_base_addr,
 
 /* Enable WDEN */
 
-static inline void pc87413_enable_wden(unsigned int swc_base_addr)
+static inline void pc87413_enable_wden(void)
 {
 	/* Step 6: Enable WDEN */
 	outb_p(inb(swc_base_addr + WDCTL) | 0x01, swc_base_addr + WDCTL);
@@ -174,7 +172,7 @@ static inline void pc87413_enable_wden(unsigned int swc_base_addr)
 }
 
 /* Enable SW_WD_TREN */
-static inline void pc87413_enable_sw_wd_tren(unsigned int swc_base_addr)
+static inline void pc87413_enable_sw_wd_tren(void)
 {
 	/* Enable SW_WD_TREN */
 	outb_p(inb(swc_base_addr + WDCFG) | 0x80, swc_base_addr + WDCFG);
@@ -185,7 +183,7 @@ static inline void pc87413_enable_sw_wd_tren(unsigned int swc_base_addr)
 
 /* Disable SW_WD_TREN */
 
-static inline void pc87413_disable_sw_wd_tren(unsigned int swc_base_addr)
+static inline void pc87413_disable_sw_wd_tren(void)
 {
 	/* Disable SW_WD_TREN */
 	outb_p(inb(swc_base_addr + WDCFG) & 0x7f, swc_base_addr + WDCFG);
@@ -196,7 +194,7 @@ static inline void pc87413_disable_sw_wd_tren(unsigned int swc_base_addr)
 
 /* Enable SW_WD_TRG */
 
-static inline void pc87413_enable_sw_wd_trg(unsigned int swc_base_addr)
+static inline void pc87413_enable_sw_wd_trg(void)
 {
 	/* Enable SW_WD_TRG */
 	outb_p(inb(swc_base_addr + WDCTL) | 0x80, swc_base_addr + WDCTL);
@@ -207,7 +205,7 @@ static inline void pc87413_enable_sw_wd_trg(unsigned int swc_base_addr)
 
 /* Disable SW_WD_TRG */
 
-static inline void pc87413_disable_sw_wd_trg(unsigned int swc_base_addr)
+static inline void pc87413_disable_sw_wd_trg(void)
 {
 	/* Disable SW_WD_TRG */
 	outb_p(inb(swc_base_addr + WDCTL) & 0x7f, swc_base_addr + WDCTL);
@@ -222,18 +220,13 @@ static inline void pc87413_disable_sw_wd_trg(unsigned int swc_base_addr)
 
 static void pc87413_enable(void)
 {
-	unsigned int swc_base_addr;
-
 	spin_lock(&io_lock);
 
-	pc87413_select_wdt_out();
-	pc87413_enable_swc();
-	swc_base_addr = pc87413_get_swc_base();
-	pc87413_swc_bank3(swc_base_addr);
-	pc87413_programm_wdto(swc_base_addr, timeout);
-	pc87413_enable_wden(swc_base_addr);
-	pc87413_enable_sw_wd_tren(swc_base_addr);
-	pc87413_enable_sw_wd_trg(swc_base_addr);
+	pc87413_swc_bank3();
+	pc87413_programm_wdto(timeout);
+	pc87413_enable_wden();
+	pc87413_enable_sw_wd_tren();
+	pc87413_enable_sw_wd_trg();
 
 	spin_unlock(&io_lock);
 }
@@ -242,17 +235,12 @@ static void pc87413_enable(void)
 
 static void pc87413_disable(void)
 {
-	unsigned int swc_base_addr;
-
 	spin_lock(&io_lock);
 
-	pc87413_select_wdt_out();
-	pc87413_enable_swc();
-	swc_base_addr = pc87413_get_swc_base();
-	pc87413_swc_bank3(swc_base_addr);
-	pc87413_disable_sw_wd_tren(swc_base_addr);
-	pc87413_disable_sw_wd_trg(swc_base_addr);
-	pc87413_programm_wdto(swc_base_addr, 0);
+	pc87413_swc_bank3();
+	pc87413_disable_sw_wd_tren();
+	pc87413_disable_sw_wd_trg();
+	pc87413_programm_wdto(0);
 
 	spin_unlock(&io_lock);
 }
@@ -261,20 +249,15 @@ static void pc87413_disable(void)
 
 static void pc87413_refresh(void)
 {
-	unsigned int swc_base_addr;
-
 	spin_lock(&io_lock);
 
-	pc87413_select_wdt_out();
-	pc87413_enable_swc();
-	swc_base_addr = pc87413_get_swc_base();
-	pc87413_swc_bank3(swc_base_addr);
-	pc87413_disable_sw_wd_tren(swc_base_addr);
-	pc87413_disable_sw_wd_trg(swc_base_addr);
-	pc87413_programm_wdto(swc_base_addr, timeout);
-	pc87413_enable_wden(swc_base_addr);
-	pc87413_enable_sw_wd_tren(swc_base_addr);
-	pc87413_enable_sw_wd_trg(swc_base_addr);
+	pc87413_swc_bank3();
+	pc87413_disable_sw_wd_tren();
+	pc87413_disable_sw_wd_trg();
+	pc87413_programm_wdto(timeout);
+	pc87413_enable_wden();
+	pc87413_enable_sw_wd_tren();
+	pc87413_enable_sw_wd_trg();
 
 	spin_unlock(&io_lock);
 }
@@ -528,7 +511,8 @@ static int __init pc87413_init(void)
 	printk(KERN_INFO PFX "Version " VERSION " at io 0x%X\n",
 							WDT_INDEX_IO_PORT);
 
-	/* request_region(io, 2, "pc87413"); */
+	if (!request_muxed_region(io, 2, MODNAME))
+		return -EBUSY;
 
 	ret = register_reboot_notifier(&pc87413_notifier);
 	if (ret != 0) {
@@ -541,12 +525,32 @@ static int __init pc87413_init(void)
 		printk(KERN_ERR PFX
 			"cannot register miscdev on minor=%d (err=%d)\n",
 			WATCHDOG_MINOR, ret);
-		unregister_reboot_notifier(&pc87413_notifier);
-		return ret;
+		goto reboot_unreg;
 	}
 	printk(KERN_INFO PFX "initialized. timeout=%d min \n", timeout);
+
+	pc87413_select_wdt_out();
+	pc87413_enable_swc();
+	pc87413_get_swc_base_addr();
+
+	if (!request_region(swc_base_addr, 0x20, MODNAME)) {
+		printk(KERN_ERR PFX
+			"cannot request SWC region at 0x%x\n", swc_base_addr);
+		ret = -EBUSY;
+		goto misc_unreg;
+	}
+
 	pc87413_enable();
+
+	release_region(io, 2);
 	return 0;
+
+misc_unreg:
+	misc_deregister(&pc87413_miscdev);
+reboot_unreg:
+	unregister_reboot_notifier(&pc87413_notifier);
+	release_region(io, 2);
+	return ret;
 }
 
 /**
@@ -569,7 +573,7 @@ static void __exit pc87413_exit(void)
 
 	misc_deregister(&pc87413_miscdev);
 	unregister_reboot_notifier(&pc87413_notifier);
-	/* release_region(io, 2); */
+	release_region(swc_base_addr, 0x20);
 
 	printk(KERN_INFO MODNAME " watchdog component driver removed.\n");
 }
diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c
index f7f5aa00df60..30da88f47cd3 100644
--- a/drivers/watchdog/s3c2410_wdt.c
+++ b/drivers/watchdog/s3c2410_wdt.c
@@ -589,6 +589,15 @@ static int s3c2410wdt_resume(struct platform_device *dev)
 #define s3c2410wdt_resume  NULL
 #endif /* CONFIG_PM */
 
+#ifdef CONFIG_OF
+static const struct of_device_id s3c2410_wdt_match[] = {
+	{ .compatible = "samsung,s3c2410-wdt" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, s3c2410_wdt_match);
+#else
+#define s3c2410_wdt_match NULL
+#endif
 
 static struct platform_driver s3c2410wdt_driver = {
 	.probe		= s3c2410wdt_probe,
@@ -599,6 +608,7 @@ static struct platform_driver s3c2410wdt_driver = {
 	.driver		= {
 		.owner	= THIS_MODULE,
 		.name	= "s3c2410-wdt",
+		.of_match_table	= s3c2410_wdt_match,
 	},
 };
 
diff --git a/drivers/watchdog/sbc7240_wdt.c b/drivers/watchdog/sbc7240_wdt.c
index ff11504c376e..93ac58953122 100644
--- a/drivers/watchdog/sbc7240_wdt.c
+++ b/drivers/watchdog/sbc7240_wdt.c
@@ -29,7 +29,7 @@
 #include <linux/watchdog.h>
 #include <linux/io.h>
 #include <linux/uaccess.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
 #include <asm/system.h>
 
 #define SBC7240_PREFIX "sbc7240_wdt: "
diff --git a/drivers/watchdog/sch311x_wdt.c b/drivers/watchdog/sch311x_wdt.c
index c7cf4b01f58d..029467e34636 100644
--- a/drivers/watchdog/sch311x_wdt.c
+++ b/drivers/watchdog/sch311x_wdt.c
@@ -472,15 +472,10 @@ static void sch311x_wdt_shutdown(struct platform_device *dev)
 	sch311x_wdt_stop();
 }
 
-#define sch311x_wdt_suspend NULL
-#define sch311x_wdt_resume  NULL
-
 static struct platform_driver sch311x_wdt_driver = {
 	.probe		= sch311x_wdt_probe,
 	.remove		= __devexit_p(sch311x_wdt_remove),
 	.shutdown	= sch311x_wdt_shutdown,
-	.suspend	= sch311x_wdt_suspend,
-	.resume		= sch311x_wdt_resume,
 	.driver		= {
 		.owner = THIS_MODULE,
 		.name = DRV_NAME,
diff --git a/drivers/watchdog/shwdt.c b/drivers/watchdog/shwdt.c
index db84f2322d1a..a267dc078daf 100644
--- a/drivers/watchdog/shwdt.c
+++ b/drivers/watchdog/shwdt.c
@@ -64,7 +64,7 @@
  * misses its deadline, the kernel timer will allow the WDT to overflow.
  */
 static int clock_division_ratio = WTCSR_CKS_4096;
-#define next_ping_period(cks)	msecs_to_jiffies(cks - 4)
+#define next_ping_period(cks)	(jiffies + msecs_to_jiffies(cks - 4))
 
 static const struct watchdog_info sh_wdt_info;
 static struct platform_device *sh_wdt_dev;
diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
index 0d80e08b6439..cc2cfbe33b30 100644
--- a/drivers/watchdog/sp805_wdt.c
+++ b/drivers/watchdog/sp805_wdt.c
@@ -134,6 +134,8 @@ static void wdt_enable(void)
 	writel(INT_ENABLE | RESET_ENABLE, wdt->base + WDTCONTROL);
 	writel(LOCK, wdt->base + WDTLOCK);
 
+	/* Flush posted writes. */
+	readl(wdt->base + WDTLOCK);
 	spin_unlock(&wdt->lock);
 }
 
@@ -144,9 +146,10 @@ static void wdt_disable(void)
 
 	writel(UNLOCK, wdt->base + WDTLOCK);
 	writel(0, wdt->base + WDTCONTROL);
-	writel(0, wdt->base + WDTLOAD);
 	writel(LOCK, wdt->base + WDTLOCK);
 
+	/* Flush posted writes. */
+	readl(wdt->base + WDTLOCK);
 	spin_unlock(&wdt->lock);
 }
 
diff --git a/drivers/watchdog/watchdog_core.c b/drivers/watchdog/watchdog_core.c
new file mode 100644
index 000000000000..cfa1a1518aad
--- /dev/null
+++ b/drivers/watchdog/watchdog_core.c
@@ -0,0 +1,111 @@
+/*
+ *	watchdog_core.c
+ *
+ *	(c) Copyright 2008-2011 Alan Cox <alan@lxorguk.ukuu.org.uk>,
+ *						All Rights Reserved.
+ *
+ *	(c) Copyright 2008-2011 Wim Van Sebroeck <wim@iguana.be>.
+ *
+ *	This source code is part of the generic code that can be used
+ *	by all the watchdog timer drivers.
+ *
+ *	Based on source code of the following authors:
+ *	  Matt Domsch <Matt_Domsch@dell.com>,
+ *	  Rob Radez <rob@osinvestor.com>,
+ *	  Rusty Lynch <rusty@linux.co.intel.com>
+ *	  Satyam Sharma <satyam@infradead.org>
+ *	  Randy Dunlap <randy.dunlap@oracle.com>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ *
+ *	Neither Alan Cox, CymruNet Ltd., Wim Van Sebroeck nor Iguana vzw.
+ *	admit liability nor provide warranty for any of this software.
+ *	This material is provided "AS-IS" and at no charge.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>	/* For EXPORT_SYMBOL/module stuff/... */
+#include <linux/types.h>	/* For standard types */
+#include <linux/errno.h>	/* For the -ENODEV/... values */
+#include <linux/kernel.h>	/* For printk/panic/... */
+#include <linux/watchdog.h>	/* For watchdog specific items */
+#include <linux/init.h>		/* For __init/__exit/... */
+
+#include "watchdog_dev.h"	/* For watchdog_dev_register/... */
+
+/**
+ * watchdog_register_device() - register a watchdog device
+ * @wdd: watchdog device
+ *
+ * Register a watchdog device with the kernel so that the
+ * watchdog timer can be accessed from userspace.
+ *
+ * A zero is returned on success and a negative errno code for
+ * failure.
+ */
+int watchdog_register_device(struct watchdog_device *wdd)
+{
+	int ret;
+
+	if (wdd == NULL || wdd->info == NULL || wdd->ops == NULL)
+		return -EINVAL;
+
+	/* Mandatory operations need to be supported */
+	if (wdd->ops->start == NULL || wdd->ops->stop == NULL)
+		return -EINVAL;
+
+	/*
+	 * Check that we have valid min and max timeout values, if
+	 * not reset them both to 0 (=not used or unknown)
+	 */
+	if (wdd->min_timeout > wdd->max_timeout) {
+		pr_info("Invalid min and max timeout values, resetting to 0!\n");
+		wdd->min_timeout = 0;
+		wdd->max_timeout = 0;
+	}
+
+	/*
+	 * Note: now that all watchdog_device data has been verified, we
+	 * will not check this anymore in other functions. If data gets
+	 * corrupted in a later stage then we expect a kernel panic!
+	 */
+
+	/* We only support 1 watchdog device via the /dev/watchdog interface */
+	ret = watchdog_dev_register(wdd);
+	if (ret) {
+		pr_err("error registering /dev/watchdog (err=%d).\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(watchdog_register_device);
+
+/**
+ * watchdog_unregister_device() - unregister a watchdog device
+ * @wdd: watchdog device to unregister
+ *
+ * Unregister a watchdog device that was previously successfully
+ * registered with watchdog_register_device().
+ */
+void watchdog_unregister_device(struct watchdog_device *wdd)
+{
+	int ret;
+
+	if (wdd == NULL)
+		return;
+
+	ret = watchdog_dev_unregister(wdd);
+	if (ret)
+		pr_err("error unregistering /dev/watchdog (err=%d).\n", ret);
+}
+EXPORT_SYMBOL_GPL(watchdog_unregister_device);
+
+MODULE_AUTHOR("Alan Cox <alan@lxorguk.ukuu.org.uk>");
+MODULE_AUTHOR("Wim Van Sebroeck <wim@iguana.be>");
+MODULE_DESCRIPTION("WatchDog Timer Driver Core");
+MODULE_LICENSE("GPL");
diff --git a/drivers/watchdog/watchdog_dev.c b/drivers/watchdog/watchdog_dev.c
new file mode 100644
index 000000000000..d33520d0b4c9
--- /dev/null
+++ b/drivers/watchdog/watchdog_dev.c
@@ -0,0 +1,395 @@
+/*
+ *	watchdog_dev.c
+ *
+ *	(c) Copyright 2008-2011 Alan Cox <alan@lxorguk.ukuu.org.uk>,
+ *						All Rights Reserved.
+ *
+ *	(c) Copyright 2008-2011 Wim Van Sebroeck <wim@iguana.be>.
+ *
+ *
+ *	This source code is part of the generic code that can be used
+ *	by all the watchdog timer drivers.
+ *
+ *	This part of the generic code takes care of the following
+ *	misc device: /dev/watchdog.
+ *
+ *	Based on source code of the following authors:
+ *	  Matt Domsch <Matt_Domsch@dell.com>,
+ *	  Rob Radez <rob@osinvestor.com>,
+ *	  Rusty Lynch <rusty@linux.co.intel.com>
+ *	  Satyam Sharma <satyam@infradead.org>
+ *	  Randy Dunlap <randy.dunlap@oracle.com>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ *
+ *	Neither Alan Cox, CymruNet Ltd., Wim Van Sebroeck nor Iguana vzw.
+ *	admit liability nor provide warranty for any of this software.
+ *	This material is provided "AS-IS" and at no charge.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>	/* For module stuff/... */
+#include <linux/types.h>	/* For standard types (like size_t) */
+#include <linux/errno.h>	/* For the -ENODEV/... values */
+#include <linux/kernel.h>	/* For printk/panic/... */
+#include <linux/fs.h>		/* For file operations */
+#include <linux/watchdog.h>	/* For watchdog specific items */
+#include <linux/miscdevice.h>	/* For handling misc devices */
+#include <linux/init.h>		/* For __init/__exit/... */
+#include <linux/uaccess.h>	/* For copy_to_user/put_user/... */
+
+/* make sure we only register one /dev/watchdog device */
+static unsigned long watchdog_dev_busy;
+/* the watchdog device behind /dev/watchdog */
+static struct watchdog_device *wdd;
+
+/*
+ *	watchdog_ping: ping the watchdog.
+ *	@wddev: the watchdog device to ping
+ *
+ *	If the watchdog has no own ping operation then it needs to be
+ *	restarted via the start operation. This wrapper function does
+ *	exactly that.
+ *	We only ping when the watchdog device is running.
+ */
+
+static int watchdog_ping(struct watchdog_device *wddev)
+{
+	if (test_bit(WDOG_ACTIVE, &wdd->status)) {
+		if (wddev->ops->ping)
+			return wddev->ops->ping(wddev);  /* ping the watchdog */
+		else
+			return wddev->ops->start(wddev); /* restart watchdog */
+	}
+	return 0;
+}
+
+/*
+ *	watchdog_start: wrapper to start the watchdog.
+ *	@wddev: the watchdog device to start
+ *
+ *	Start the watchdog if it is not active and mark it active.
+ *	This function returns zero on success or a negative errno code for
+ *	failure.
+ */
+
+static int watchdog_start(struct watchdog_device *wddev)
+{
+	int err;
+
+	if (!test_bit(WDOG_ACTIVE, &wdd->status)) {
+		err = wddev->ops->start(wddev);
+		if (err < 0)
+			return err;
+
+		set_bit(WDOG_ACTIVE, &wdd->status);
+	}
+	return 0;
+}
+
+/*
+ *	watchdog_stop: wrapper to stop the watchdog.
+ *	@wddev: the watchdog device to stop
+ *
+ *	Stop the watchdog if it is still active and unmark it active.
+ *	This function returns zero on success or a negative errno code for
+ *	failure.
+ *	If the 'nowayout' feature was set, the watchdog cannot be stopped.
+ */
+
+static int watchdog_stop(struct watchdog_device *wddev)
+{
+	int err = -EBUSY;
+
+	if (test_bit(WDOG_NO_WAY_OUT, &wdd->status)) {
+		pr_info("%s: nowayout prevents watchdog to be stopped!\n",
+							wdd->info->identity);
+		return err;
+	}
+
+	if (test_bit(WDOG_ACTIVE, &wdd->status)) {
+		err = wddev->ops->stop(wddev);
+		if (err < 0)
+			return err;
+
+		clear_bit(WDOG_ACTIVE, &wdd->status);
+	}
+	return 0;
+}
+
+/*
+ *	watchdog_write: writes to the watchdog.
+ *	@file: file from VFS
+ *	@data: user address of data
+ *	@len: length of data
+ *	@ppos: pointer to the file offset
+ *
+ *	A write to a watchdog device is defined as a keepalive ping.
+ *	Writing the magic 'V' sequence allows the next close to turn
+ *	off the watchdog (if 'nowayout' is not set).
+ */
+
+static ssize_t watchdog_write(struct file *file, const char __user *data,
+						size_t len, loff_t *ppos)
+{
+	size_t i;
+	char c;
+
+	if (len == 0)
+		return 0;
+
+	/*
+	 * Note: just in case someone wrote the magic character
+	 * five months ago...
+	 */
+	clear_bit(WDOG_ALLOW_RELEASE, &wdd->status);
+
+	/* scan to see whether or not we got the magic character */
+	for (i = 0; i != len; i++) {
+		if (get_user(c, data + i))
+			return -EFAULT;
+		if (c == 'V')
+			set_bit(WDOG_ALLOW_RELEASE, &wdd->status);
+	}
+
+	/* someone wrote to us, so we send the watchdog a keepalive ping */
+	watchdog_ping(wdd);
+
+	return len;
+}
+
+/*
+ *	watchdog_ioctl: handle the different ioctl's for the watchdog device.
+ *	@file: file handle to the device
+ *	@cmd: watchdog command
+ *	@arg: argument pointer
+ *
+ *	The watchdog API defines a common set of functions for all watchdogs
+ *	according to their available features.
+ */
+
+static long watchdog_ioctl(struct file *file, unsigned int cmd,
+							unsigned long arg)
+{
+	void __user *argp = (void __user *)arg;
+	int __user *p = argp;
+	unsigned int val;
+	int err;
+
+	if (wdd->ops->ioctl) {
+		err = wdd->ops->ioctl(wdd, cmd, arg);
+		if (err != -ENOIOCTLCMD)
+			return err;
+	}
+
+	switch (cmd) {
+	case WDIOC_GETSUPPORT:
+		return copy_to_user(argp, wdd->info,
+			sizeof(struct watchdog_info)) ? -EFAULT : 0;
+	case WDIOC_GETSTATUS:
+		val = wdd->ops->status ? wdd->ops->status(wdd) : 0;
+		return put_user(val, p);
+	case WDIOC_GETBOOTSTATUS:
+		return put_user(wdd->bootstatus, p);
+	case WDIOC_SETOPTIONS:
+		if (get_user(val, p))
+			return -EFAULT;
+		if (val & WDIOS_DISABLECARD) {
+			err = watchdog_stop(wdd);
+			if (err < 0)
+				return err;
+		}
+		if (val & WDIOS_ENABLECARD) {
+			err = watchdog_start(wdd);
+			if (err < 0)
+				return err;
+		}
+		return 0;
+	case WDIOC_KEEPALIVE:
+		if (!(wdd->info->options & WDIOF_KEEPALIVEPING))
+			return -EOPNOTSUPP;
+		watchdog_ping(wdd);
+		return 0;
+	case WDIOC_SETTIMEOUT:
+		if ((wdd->ops->set_timeout == NULL) ||
+		    !(wdd->info->options & WDIOF_SETTIMEOUT))
+			return -EOPNOTSUPP;
+		if (get_user(val, p))
+			return -EFAULT;
+		if ((wdd->max_timeout != 0) &&
+		    (val < wdd->min_timeout || val > wdd->max_timeout))
+				return -EINVAL;
+		err = wdd->ops->set_timeout(wdd, val);
+		if (err < 0)
+			return err;
+		wdd->timeout = val;
+		/* If the watchdog is active then we send a keepalive ping
+		 * to make sure that the watchdog keep's running (and if
+		 * possible that it takes the new timeout) */
+		watchdog_ping(wdd);
+		/* Fall */
+	case WDIOC_GETTIMEOUT:
+		/* timeout == 0 means that we don't know the timeout */
+		if (wdd->timeout == 0)
+			return -EOPNOTSUPP;
+		return put_user(wdd->timeout, p);
+	default:
+		return -ENOTTY;
+	}
+}
+
+/*
+ *	watchdog_open: open the /dev/watchdog device.
+ *	@inode: inode of device
+ *	@file: file handle to device
+ *
+ *	When the /dev/watchdog device gets opened, we start the watchdog.
+ *	Watch out: the /dev/watchdog device is single open, so we make sure
+ *	it can only be opened once.
+ */
+
+static int watchdog_open(struct inode *inode, struct file *file)
+{
+	int err = -EBUSY;
+
+	/* the watchdog is single open! */
+	if (test_and_set_bit(WDOG_DEV_OPEN, &wdd->status))
+		return -EBUSY;
+
+	/*
+	 * If the /dev/watchdog device is open, we don't want the module
+	 * to be unloaded.
+	 */
+	if (!try_module_get(wdd->ops->owner))
+		goto out;
+
+	err = watchdog_start(wdd);
+	if (err < 0)
+		goto out_mod;
+
+	/* dev/watchdog is a virtual (and thus non-seekable) filesystem */
+	return nonseekable_open(inode, file);
+
+out_mod:
+	module_put(wdd->ops->owner);
+out:
+	clear_bit(WDOG_DEV_OPEN, &wdd->status);
+	return err;
+}
+
+/*
+ *      watchdog_release: release the /dev/watchdog device.
+ *      @inode: inode of device
+ *      @file: file handle to device
+ *
+ *	This is the code for when /dev/watchdog gets closed. We will only
+ *	stop the watchdog when we have received the magic char (and nowayout
+ *	was not set), else the watchdog will keep running.
+ */
+
+static int watchdog_release(struct inode *inode, struct file *file)
+{
+	int err = -EBUSY;
+
+	/*
+	 * We only stop the watchdog if we received the magic character
+	 * or if WDIOF_MAGICCLOSE is not set. If nowayout was set then
+	 * watchdog_stop will fail.
+	 */
+	if (test_and_clear_bit(WDOG_ALLOW_RELEASE, &wdd->status) ||
+	    !(wdd->info->options & WDIOF_MAGICCLOSE))
+		err = watchdog_stop(wdd);
+
+	/* If the watchdog was not stopped, send a keepalive ping */
+	if (err < 0) {
+		pr_crit("%s: watchdog did not stop!\n", wdd->info->identity);
+		watchdog_ping(wdd);
+	}
+
+	/* Allow the owner module to be unloaded again */
+	module_put(wdd->ops->owner);
+
+	/* make sure that /dev/watchdog can be re-opened */
+	clear_bit(WDOG_DEV_OPEN, &wdd->status);
+
+	return 0;
+}
+
+static const struct file_operations watchdog_fops = {
+	.owner		= THIS_MODULE,
+	.write		= watchdog_write,
+	.unlocked_ioctl	= watchdog_ioctl,
+	.open		= watchdog_open,
+	.release	= watchdog_release,
+};
+
+static struct miscdevice watchdog_miscdev = {
+	.minor		= WATCHDOG_MINOR,
+	.name		= "watchdog",
+	.fops		= &watchdog_fops,
+};
+
+/*
+ *	watchdog_dev_register:
+ *	@watchdog: watchdog device
+ *
+ *	Register a watchdog device as /dev/watchdog. /dev/watchdog
+ *	is actually a miscdevice and thus we set it up like that.
+ */
+
+int watchdog_dev_register(struct watchdog_device *watchdog)
+{
+	int err;
+
+	/* Only one device can register for /dev/watchdog */
+	if (test_and_set_bit(0, &watchdog_dev_busy)) {
+		pr_err("only one watchdog can use /dev/watchdog.\n");
+		return -EBUSY;
+	}
+
+	wdd = watchdog;
+
+	err = misc_register(&watchdog_miscdev);
+	if (err != 0) {
+		pr_err("%s: cannot register miscdev on minor=%d (err=%d).\n",
+			watchdog->info->identity, WATCHDOG_MINOR, err);
+		goto out;
+	}
+
+	return 0;
+
+out:
+	wdd = NULL;
+	clear_bit(0, &watchdog_dev_busy);
+	return err;
+}
+
+/*
+ *	watchdog_dev_unregister:
+ *	@watchdog: watchdog device
+ *
+ *	Deregister the /dev/watchdog device.
+ */
+
+int watchdog_dev_unregister(struct watchdog_device *watchdog)
+{
+	/* Check that a watchdog device was registered in the past */
+	if (!test_bit(0, &watchdog_dev_busy) || !wdd)
+		return -ENODEV;
+
+	/* We can only unregister the watchdog device that was registered */
+	if (watchdog != wdd) {
+		pr_err("%s: watchdog was not registered as /dev/watchdog.\n",
+			watchdog->info->identity);
+		return -ENODEV;
+	}
+
+	misc_deregister(&watchdog_miscdev);
+	wdd = NULL;
+	clear_bit(0, &watchdog_dev_busy);
+	return 0;
+}
diff --git a/drivers/watchdog/watchdog_dev.h b/drivers/watchdog/watchdog_dev.h
new file mode 100644
index 000000000000..bc7612be25ce
--- /dev/null
+++ b/drivers/watchdog/watchdog_dev.h
@@ -0,0 +1,33 @@
+/*
+ *	watchdog_core.h
+ *
+ *	(c) Copyright 2008-2011 Alan Cox <alan@lxorguk.ukuu.org.uk>,
+ *						All Rights Reserved.
+ *
+ *	(c) Copyright 2008-2011 Wim Van Sebroeck <wim@iguana.be>.
+ *
+ *	This source code is part of the generic code that can be used
+ *	by all the watchdog timer drivers.
+ *
+ *	Based on source code of the following authors:
+ *	  Matt Domsch <Matt_Domsch@dell.com>,
+ *	  Rob Radez <rob@osinvestor.com>,
+ *	  Rusty Lynch <rusty@linux.co.intel.com>
+ *	  Satyam Sharma <satyam@infradead.org>
+ *	  Randy Dunlap <randy.dunlap@oracle.com>
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ *
+ *	Neither Alan Cox, CymruNet Ltd., Wim Van Sebroeck nor Iguana vzw.
+ *	admit liability nor provide warranty for any of this software.
+ *	This material is provided "AS-IS" and at no charge.
+ */
+
+/*
+ *	Functions/procedures to be called by the core
+ */
+int watchdog_dev_register(struct watchdog_device *);
+int watchdog_dev_unregister(struct watchdog_device *);
diff --git a/drivers/watchdog/wm831x_wdt.c b/drivers/watchdog/wm831x_wdt.c
index 8c4b2d5bb7da..871caea4e1c6 100644
--- a/drivers/watchdog/wm831x_wdt.c
+++ b/drivers/watchdog/wm831x_wdt.c
@@ -320,6 +320,11 @@ static int __devinit wm831x_wdt_probe(struct platform_device *pdev)
 	struct wm831x_watchdog_pdata *pdata;
 	int reg, ret;
 
+	if (wm831x) {
+		dev_err(&pdev->dev, "wm831x watchdog already registered\n");
+		return -EBUSY;
+	}
+
 	wm831x = dev_get_drvdata(pdev->dev.parent);
 
 	ret = wm831x_reg_read(wm831x, WM831X_WATCHDOG);